Mu`adh (May Allah be pleased with him) reported:
The Messenger of Allah (Sall-Allahu alayhi wa sallam )
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).''
Hadrat Anas Radi ALLAH Taala Anhu reported that the Messenger of Allah Peace And Blessings Be Upon Him has said, “Everything has a heart, and the heart of the Qur’an is Yasin. Allah records anyone who recites Yasin as having recited the Qur’an ten times.”
[Sunan Tirmidhi, Vol 2, Page 116 - Sunan Daarimi, Vol 2, Page 336]