In The Name of Allaah, The Most Merciful, The Bestower of Mercy.

Allaah [Glorified and Exalted be He] said:

وَعَجِبُوٓاْ أَن جَآءَهُم مُّنذِرٌ۬ مِّنۡہُمۡ‌ۖ وَقَالَ ٱلۡكَـٰفِرُونَ هَـٰذَا سَـٰحِرٌ۬ كَذَّابٌ (٤) أَجَعَلَ ٱلۡأَلِهَةَ إِلَـٰهً۬ا وَٲحِدًا‌ۖ إِنَّ هَـٰذَا لَشَىۡءٌ عُجَابٌ۬ (٥)وَٱنطَلَقَ ٱلۡمَلَأُ مِنۡہُمۡ أَنِ ٱمۡشُواْ وَٱصۡبِرُواْ عَلَىٰٓ ءَالِهَتِكُمۡ‌ۖ إِنَّ هَـٰذَا لَشَىۡءٌ۬ يُرَادُ (٦) مَا سَمِعۡنَا بِہَـٰذَا فِى ٱلۡمِلَّةِ ٱلۡأَخِرَةِ إِنۡ هَـٰذَآ إِلَّا ٱخۡتِلَـٰقٌ (٧) أَءُنزِلَ عَلَيۡهِ ٱلذِّكۡرُ مِنۢ بَيۡنِنَا‌ۚ بَلۡ هُمۡ فِى شَكٍّ۬ مِّن ذِكۡرِى‌ۖ بَل لَّمَّا يَذُوقُواْ عَذَابِ

And they (Arab pagans) wonder that a warner (Prophet Muhammad) has come to them from among themselves! And the disbelievers say: ‘This (Prophet Muhammad) is a sorcerer, a liar.   Has he made the aaliha (gods) (all) into One Ilaah (God – Allaah). Verily, this is a curious thing!’ And the leaders among them went about (saying): “Go on and remain constant to your aaliha (gods)! Verily, this is a thing designed (against you)! We have not heard (the like) of this among the people of these later days. This is nothing but an invention!  Has the Reminder been sent down to him (alone) from among us?” Nay! but they are in doubt about My Reminder (this Qur’aan)! Nay, but they have not tasted (My) Torment! [Soorah Saad; Ayah:4-8]

So, you say to the Raafidah: Indeed, it is shirk to call upon other than Allaah with regards to seeking benefit and seeking protection from harm regarding a matter which none can [fulfil] except Allaah.  It is not permissible to call upon Ali Ibn Abee Taalib [radiyallaahu-anhu] or other than him amongst the dead [may Allaah have mercy upon them], because Allaah [The Mighty and Majestic] said:

وَٱلَّذِينَ تَدۡعُونَ مِن دُونِهِۦ مَا يَمۡلِكُونَ مِن قِطۡمِيرٍ (١٣) إِن تَدۡعُوهُمۡ لَا يَسۡمَعُواْ دُعَآءَكُمۡ وَلَوۡ سَمِعُواْ مَا ٱسۡتَجَابُواْ لَكُمۡۖ وَيَوۡمَ ٱلۡقِيَـٰمَةِ يَكۡفُرُونَ بِشِرۡڪِكُمۡۚ وَلَا يُنَبِّئُكَ مِثۡلُ خَبِيرٍ۬ (١٤)

And those, whom you invoke or call upon instead of Him, own not even a Qitmeer (the thin membrane over the date stone).  If you invoke (or call upon) them, they hear not your call, and if (in case) they were to hear, they could not grant it (your request) to you. And on the Day of Resurrection, they will disown your worshipping them. And none can inform you (O Muhammad) like Him Who is the All-Knower (of each and everything).  O mankind! it is you who stand in need of Allaah, but Allaah is Rich (Free of all wants and needs), Worthy of all praise.’ [Soorah Faatir; Ayah:13-14]

And Allaah [Glorified be He and free is He from all imperfections] said:

وَمَنۡ أَضَلُّ مِمَّن يَدۡعُواْ مِن دُونِ ٱللَّهِ مَن لَّا يَسۡتَجِيبُ لَهُ ۥۤ إِلَىٰ يَوۡمِ ٱلۡقِيَـٰمَةِ وَهُمۡ عَن دُعَآٮِٕهِمۡ غَـٰفِلُونَ (٥) وَإِذَا حُشِرَ ٱلنَّاسُ كَانُواْ لَهُمۡ أَعۡدَآءً۬ وَكَانُواْ بِعِبَادَتِہِمۡ كَـٰفِرِينَ (٦)

‘And who is more astray than one who calls (invokes) besides Allaah, such as will not answer him till the Day of Resurrection, and who are (even) unaware of their calls (invocations) to them?  And when mankind are gathered (on the Day of Resurrection), they (false deities) will become enemies for them and will deny their worshipping.’ [Soorah Ahqaaf. Aayah:5-6]

And Allaah [Glorified be He and free is He from all imperfections] said:

وَمَن يَدۡعُ مَعَ ٱللَّهِ إِلَـٰهًا ءَاخَرَ لَا بُرۡهَـٰنَ لَهُ ۥ بِهِۦ فَإِنَّمَا حِسَابُهُ ۥ عِندَ رَبِّهِۦۤ‌ۚ إِنَّهُ ۥ لَا يُفۡلِحُ ٱلۡكَـٰفِرُونَ

‘And whoever invokes (or worships), besides Allaah, any other ilaah (god), of whom he has no proof, then his reckoning is only with his Lord. Surely! Al-Kaafiroon (the disbelievers in Allaah and in the Oneness of Allaah, polytheists, pagans, idolaters, etc.) will not be successful.’ [Soorah Muminoon; Ayah:117]

And if you say, ‘’Indeed others have joined them (i.e. the Mushrikoon) in this (affair)’’, so I say, ‘’Whoever joins them in this (affair of shirk) is similar to them.’  Allaah said:

وَلَا تَدۡعُ مِن دُونِ ٱللَّهِ مَا لَا يَنفَعُكَ وَلَا يَضُرُّكَ‌ۖ فَإِن فَعَلۡتَ فَإِنَّكَ إِذً۬ا مِّنَ ٱلظَّـٰلِمِينَ (١٠٦) وَإِن يَمۡسَسۡكَ ٱللَّهُ بِضُرٍّ۬ فَلَا ڪَاشِفَ لَهُ ۥۤ إِلَّا هُوَ‌ۖ وَإِن يُرِدۡكَ بِخَيۡرٍ۬ فَلَا رَآدَّ لِفَضۡلِهِۦ‌ۚ يُصِيبُ بِهِۦ مَن يَشَآءُ مِنۡ عِبَادِهِۦ‌ۚ وَهُوَ ٱلۡغَفُورُ ٱلرَّحِيمُ (١٠٧)

And invoke not besides Allaah, any that will neither profit you, nor hurt you, but if (in case) you did so, you shall certainly be one of the Zaalimoon (polytheists and wrong doers).  And if Allaah touches you with hurt, there is none who can remove it but He; and if He intends any good for you, there is none who can repel His Favour which He causes it to reach whomsoever of His slaves He will. And He is the Oft-Forgiving, Most Merciful.’ [Soorah Yoonus; Ayah:106-107]

When you relate these verses and their likes to the (Rawaafid), and then say to them, ‘’Indeed, is it permissible to call upon the dead and seek deliverance and rescue from them?’’  They (reply), ‘’You are a Wahhaabi; you hate the family of the Prophet (sallal-laahu-alayhi-wasallam).’’ This is the same (affair) with the extreme Soofees; when you say, ‘’Indeed, the awliyaa can neither benefit nor harm’, they (soofees) say, ‘you hate the awliyaa.’’ Indeed, Mighty is the word that comes out of the mouths of these two sects; they utter nothing but a lie.

Ilhaadul Khumeini Fee Ardil Haramayn. Pages 206-207. Slightly paraphrased