In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
One of the benefits of Dhikr is that it is a reason behind one being declared truthful by Allaah, because indeed the one who remembers Allaah [is in reality] speaking about Allaah’s Perfect Attributes and Exalted Characteristics. So, when a person speaks about [Allaah’s Perfect Attributes and Exalted Characteristics], Allaah declares that what he [i.e. the person] says is true, and whoever is declared truthful by Allaah will not be resurrected with the liars; rather it is hoped that he will be resurrected with the truthful ones. Abee Ishaaq narrated from Al-A’ghar Bin Muslim who bore witness that Abu Hurairah and Abu Sa’eed Al-Khudree [radiyallaahu-anhumaa] bore witness that Allaah’s Messenger [sallal laahu alayhi wasallam] said:
“When the servant says, ‘Laa ilaaha illal-laah Wa Allahu Akbar [None has the right to be worshipped except Allaah and Allaah is the Most Great],’ Allaah says, ‘My servant has spoken the truth; none has the right to be worshipped except I, and I am the Most Great.’ When he says, ‘Laa ilaaha Illal laahu Wahdahu [None has the right to be worshipped except Allaah alone]’, Allaah says, ‘My servant has spoken the truth; none has the right to be worshipped except I, alone.’ When he says, Laa ilaha Ilal laah, laa Shareekalahu [None has the right to be worshipped except Allaah, He has no partner or (associate)],’ Allah says, ‘My servant has spoken the truth; none has the right to be worshipped except I, and I have no partner (or associate).’ When he says, ‘Laa ilaaha illal laah, lahul Mulku Wa lahul Hamdu [None has the right to be worshipped except Allaah, all dominion is His and all praise is to Him],’ Allaah says, ‘My servant has spoken the truth; none has the right to be worshipped except I, all dominion is Mine and all praise is due to Me.’ When he says: ‘ Laa ilaaha illal laa, laa hawla wa la quwwata illaa billah [None has the right to be worshipped except Allaah and there is no power and nor strength (given to anything to move or alternate from one state to another except by the will of) Allaah],’ Allah says, ‘My servant has spoken the truth; none has the right to be worshipped except I, and there is no power and nor strength (given to anything to move or alternate from one state to another except by My Will)].’ One of the narrators Abu Ishaq said: “Then A’gharr said something that I did not understand. I said to Abu Jafar: ‘What did he say?’ He said: ‘Whoever is blessed with [the ability to say] them [i.e. these words] at the time of death, the Fire will not touch him.'” [Sunan Ibn Maajah. Number 3794. Sunan Tirmidhee 3430. Silsilah Al-Hadeeth As-Saheehah. Number 1390]
From the benefits of Dhikr is that profuse remembrance of Allaah is a safeguard against hypocrisy, for indeed the hypocrites remember Allaah very little. Allaah said about the hypocrites: [وَلَا يَذۡكُرُونَ ٱللَّهَ إِلَّا قَلِيلاً۬ – And they do not remember Allah but little]. [Surah An-Nisaa Aayah 142]
Ka’b said: “Whoever remembers Allaah [The Mighty and Majestic] a lot, he will be free from hypocrisy.’’ And perhaps this is why Allaah ended Surah Al-Munaafiqoon with the statement: [ يَـٰٓأَيُّہَا ٱلَّذِينَ ءَامَنُواْ لَا تُلۡهِكُمۡ أَمۡوَٲلُكُمۡ وَلَآ أَوۡلَـٰدُڪُمۡ عَن ذِڪۡرِ ٱللَّهِۚ وَمَن يَفۡعَلۡ ذَٲلِكَ فَأُوْلَـٰٓٮِٕكَ هُمُ ٱلۡخَـٰسِرُونَ – O you who believe! Let not your properties or your children divert you from the remembrance of Allah. And whosoever does that, then they are the losers]. [Surah Al-Munaafiqoon. Aayah 9]
This is because [the Aayah] contains a warning against the Fitna of the hypocrites, who are heedless of Allaah’s remembrance and thus fall into hypocrisy. Little remembrance of Allaah is one of the signs of hypocrisy, therefore profuse remembrance of Allaah is a safeguard against hypocrisy.
From the benefits of Dhikr is that it is a healing for the hearts and a remedy for its diseases. Mak’hool Bin Abdillaah [rahimahullaah] said, “Mentioning Allaah [i.e. Dhikr] is a remedy [i.e. it purifies the heart] and mentioning the people [i.e. by way of impermissible speech] is a disease.’’ Also Dhikr removes hardness of the heart, for there is a hardness in the heart that cannot go away except by way of Dhikr. A man came to Hasan Al-Basri [rahimahullaah] and said, “O Abaa Sa’eed! I complain to you about the hardness of my heart”, he said, “Expel it through remembrance of Allaah.”
From the benefits of Dhikr is that Allaah will be a close ally of the one who remembers Him. Allaah will love, support and grant him Tawfeeq [i.e. guide him and enable him to act upon that guidance], just as Allaah said:[ [إِنَّ ٱللَّهَ مَعَ ٱلَّذِينَ ٱتَّقَواْ وَّٱلَّذِينَ هُم مُّحۡسِنُونَ – Truly, Allah is with those who fear Him (i.e. He grants them aid and assistance (ref1), and those who are Muhsinoon (good-doers)]. [Surah An-Nahl. Aayah 128]
Allaah said: [وَٱللَّهُ مَعَ ٱلصَّـٰبِرِينَ – And Allah is with the patient ones (i.e. He grants them aid and assistance (Ref2)] [Surah Al-Baqarah. Aayah 249]
Allaah said: [وَإِنَّ ٱللَّهَ لَمَعَ ٱلۡمُحۡسِنِينَ – And verily, Allah is with the good doers (i.e. He grants them aid and assistance (Ref 3)]. [Surah Al-Ankabut. Aayah 69]
The one who remembers Allaah has a great share of this, just as it has been reported in a Hadeeth Qudsee: “Allaah says: ‘I am with My slave when he remembers Me and his lips move whilst mentioning Me. [i.e. I grant him aid, assistance, help and Tawfeeq [guide him and grant him the ability to act upon that guidance(Ref 4)] ’’ [Ibn Maajah 3792]
From the benefits of Dhikr is that it brings about blessings [or bounties] and repels vengeance. There’s nothing that earns a person blessing and repels vengeance [from him] in a manner [more effective] than remembrance of Allaah. Allaah said: [إِنَّ ٱللَّهَ يُدَٲفِعُ عَنِ ٱلَّذِينَ ءَامَنُوٓاْۗ – Truly, Allah defends those who believe]. [Surah Hajj. Aayah 38]
Allaah’s defence for a person is based on the strength of the person’s Eemaan and its perfection, and the essence of Eemaan and its strength is remembrance of Allaah. So whoever’s Eemaan is more perfect and his remembrance is more [than that of others], then his share will be greater [i.e. he’ll receive more protection from Allaah]. [Source: Fiqhul Ad-iyah Wal Ad-kaar. Pages 22-24. Sections 1 & 2. Slightly paraphrased]
Refs 1, 2 & 3: Zaadul Maseer Fee Ilmit Tafseer; Ref 4: Shurooh Sunan Ibn Maajah [As-Suyootee, Al-Hindee, Ad-Dehlawiy…Page1376. Kitab Al-Adab]