Ibn Abee Shaybah رحمه الله reported in Kitaab Al-Imaan & also in Al-Musannaf that Abu Dardaa رضي اللّه عنـه always use to supplicate saying: اللَّهُمَّ إِنِّي أَسْأَلُكَ إيمَانًا دَائِمًا وَعِلْمًا نَافِعًا وَهَدْيًا قَيِّمًا ‘ O Allaah! I ask you for abiding Imaan, beneficial knowledge & upright guidance . ’ Mu-aawiyyah Ibn Qurra رحمه الله transmitted this narration from Abu Dardaa & then said: “ Because there is Imaan that is not abiding, knowledge that is not beneficial & guidance that is not upright .” [Source: Quoted by Shaikh Abdur-Razzaaq Al-Badr in Al-Madkhal Li-diraasaat Al-Aqeedah Al-Islaamiyyah: Lesson 2]