Islamicknowledge113

Quran verses in Al-Haqqah (surah 69) are thought to refer to the reckoning on Judgement Day: As for the one who is given his book in his right hand, he will say: Take and read my book. I knew that I would be called to account. And he will be in a blissful condition (Q.69:19–21) ....

Abdullah asked the Prophet Muhammad (SAW) "Which deed is the dearest to Allah?" He replied, "To offer the prayers at their early stated fixed times." (Sahih al-Bukhari 527