Quranic Verse

(They say): "Our Lord! Let not our hearts deviate (from the truth) after You have guided us, and grant us mercy from You. Truly, You are the Bestower."

(Aal-e-Imran, Chapter #3, Verse #8)

Hadith-e-Nabvi (saw) of the dayNarrated Nafi': Whenever Ibn 'Umar started the prayer with Takbir, he used to raise his hands: whenever he bowed, he used to raise his hands (before bowing) and also used to raise his hands on saying, "Sami a-l-lahu Liman hamida", and he used to do the same on rising from the second Rak'a (for the 3rd Rak'a). Ibn 'Umar said: "The Prophet used to do the same."
(Sahih Bukhari, Book #12, Hadith #706)