Muwatta Malik 505
موطأ مالك#505SahihYahya related to me from Malik that Zayd ibn Aslam used to say, "No-one makes a dua without one of three things happening. Either it is answered, or it is stored up for him, or wrong actions are atoned for by it
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Salim al-HilaliMaqtu Sahih
In-book reference: 15:36