What is the supplication recited during the prostration of forgetfulness (sujood al-sahw)? And what was the reason for the revelation of the noble verse: "And do not ever pray over any of them who has died or stand by his grave. Indeed, they disbelieved in Allah and His Messenger and died while they were defiantly disobedient"?

The noble verse: "And never (O Muhammad) pray (funerary prayer) over any of them who dies, nor stand by his grave. Certainly, they disbelieved in Allah and His Messenger, and died while they were Fasiqoon (rebellious, disobedient to Allah)." was revealed concerning Abdullah ibn Ubayy ibn Salul. His son asked the Prophet, peace and blessings be upon him, to pray over him. Despite Umar's objection, the Prophet prayed over him, relying on the verse of choice regarding seeking forgiveness. Then this verse was revealed, prohibiting prayer over hypocrites and standing by their graves.