Ask Allaah a Lasting Faith

Mu’âwiyah b. Qurrah reports that Abû Al-Dardâ` used to say,

“We ask Allâh for a lasting faith (îmân), true certainty and beneficial knowledge.”

Nas alullaaha eemaanan daayiman, wa yaqeenan saadhiqan, wa ilman naafiyan

Mu’âwiyah 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-Ibânah Al-Kubrâ Vol. 2 p498.

Source : http://www.sayingsofthesalaf.net