It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him); Yunus said: I think he mentioned it from the Prophet (peace and blessings be upon him), who said: "The first of people's deeds for which they will be brought to account on the Day of Resurrection is the prayer. Our Lord, the Mighty and Majestic, will say to His angels, though He knows best: 'Look at the prayer of My servant: did he complete it or fall short in it?' If it is complete, it will be recorded for him as complete. If he fell short in any of it, He will say: 'Look whether My servant has any voluntary prayers.' If he has voluntary prayers, He will say: 'Complete My servant's obligatory prayer from his voluntary prayers.' Then the rest of the deeds will be taken to account in the same way." This hadith has a sahih (authentic) chain, but the two Shaykhs did not record it.