Bismillaahir Rahmaanir Raheem
As Salamu Alaykum wa Rahmatullahi Wa Barkatuh!
Mu`adh (Radi'Allahu anhu) reported:
The Messenger of Allah (Sall'Allahu alaihi wasallam)
took hold of my hand and said,
"O Mu`adh! By Allah I love you,
so I advise you to never forget
to recite after every prayer:
"Allahumma a`inni ala dhikrika,
wa shukrika, wa husni `ibadatika "
(O Allah, help me remember You, to be grateful to You,
and to worship You in an excellent manner).''
Alahumma infa`ni bima `allamtani
wa `allamni ma yanfa`uni!
OH ALLAH! Make useful for me what You taught me
and teach me knowledge that will be useful to me!