What are the Rewards of Sleeping in a State of Ritual Purity (Wudu)?

Answered by Ustadh Tabraze Azam
Question: Assalam Alaikum,
I received a message saying that when a person makes wudu before sleep then 1) the person’s soul makes tawwaf of the kaba 2) during the entire night, angels will be writing hasanath for that person 3) when the person turns from left to right and right to left angels ask Allah for his/her forgiveness. Kindly inform me is this from an authentic hadees? 
Answer: Wa alaikum assalam wa rahmatullahi wa barakatuh,
I pray that this finds you in the best of health and spirits, insha’Allah.
It is a recommended sunna to sleep in a state of ritual purity. [Shurunbulali, Maraqi al-Falah]
The Messenger of Allah (Allah bless him and give him peace) said, “When you go to bed, you should perform the ablution (wudu) for the prayer, and then lay down on your right side. Then say, ‘O Allah, I have turned my face to You and I have surrendered my self to You and I have committed my back to You out of fear and desire for You. There is no place of safety or refuge from You except with You. I have believed in Your book which You revealed and Your Prophet whom You sent.’ If you die that night, you will die in fitra (natural state). And make these the last words you utter.'” [Bukhari]
Angels pray for the Person who sleeps in a State of Purity
As for the angels praying for you, this too has been related. It is reported that the Messenger of Allah (Allah bless him and give him peace) said, “Purify these bodies, and Allah will purify you. There is not a slave who spends his night in a state of purification except that an angel spends the night besides him. And whenever the slave turns over during the night, the angel says: ‘O Allah, forgive Your slave, for he went to sleep in a state of purification.’” [Tabarani, al-Mu`jam al-Kabir]
And Allah alone gives success.
wassalam,
Tabraze Azam
Checked & Approved by Faraz Rabbani