In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Ibn Abee Shaybah [rahimahullaah] reported in Kitaab Al-Imaan and also in Al-Musannaf that Abu Dardaa [radiyallaahu-anhu] always use to supplicate, saying:
[اللَّهُمَّ إِنِّي أَسْأَلُكَ إيمَانًا دَائِمًا وَعِلْمًا نَافِعًا وَهَدْيًا قَيِّمًا – O Allaah! I ask you for abiding Imaan, beneficial knowledge and upright guidance].
Mu-aawiyyah Ibn Qurra [rahimahullaah] transmitted this narration from Abu Dardaa and then said: ‘’That is because there is Imaan that is not abiding, knowledge that is not beneficial and guidance that is not upright’’.
[Source: Quoted by Shaikh Abdur-Razzaaq Al-Badr in Al-Madkhal Li-diraasaat Al-Aqeedah Al-Islaamiyyah: Lesson 2]