Mu’āwiyah b. Qurrah reports that Abū Al-Dardā` used to say, “We ask Allāh for a lasting faith (īmān), true certainty and beneficial knowledge.” Mu’āwiyah b. Qurrah then said, “So this indicates that there is a type of faith that does not last, and a type of certainty that is not true, and a type of knowledge that is not beneficial.”

Ibn Battah, Al-Ibānah Al-Kubrā Vol. 2 p498.

Note

The supplication mentioned above is as follows in Arabic:

Supplication reported from Abu Al-Darda about asking Allah for lasting faith, ture certainty and beneficial knowledge.