Hadith 436:10
Al-Hasan ibn Musa narrated to us, he said: Hammad ibn Salamah narrated to us, from al-Azraq ibn Qays, from Yahya ibn Ya'mar, from a man among the companions of the Prophet, may God bless him and grant him peace, who said: The Messenger of God, may God bless him and grant him peace, said: "The first thing for which the servant will be held accountable on the Day of Resurrection is his prayer. If he completed it, it is recorded for him as complete. And if he did not complete it, God, the Almighty and Majestic, says: 'Look, do you find any voluntary acts for My servant, so that you may complete his obligatory acts with them?' Then the Zakat is likewise, then the deeds are taken according to that account."
حدثنا الحسن بن موسى، قال: حدثنا حماد بن سلمة، عن الأزرق بن قيس، عن يحيى بن يعمر، عن رجل، من أصحاب النبي صلى الله عليه وسلم قال: قال رسول الله صلى الله عليه وسلم: " أول ما يحاسب به العبد يوم القيامة صلاته، فإن كان أتمها كتبت له تامة، وإن لم يكن أتمها قال الله عز وجل: انظروا هل تجدون لعبدي من تطوع فتكملون بها فريضته، ثم الزكاة كذلك، ثم تؤخذ الأعمال على حساب ذلك "