Volume 8, Book 75, Number 323:
Narrated Al-Bara bin ‘Azib:
Allah’s Apostle said to me, “When you want to go to bed, perform ablution as you do for prayer,
then lie down on your right side and say: ‘Allahumma aslamtu wajhi ilaika, wa fauwadtu Amri ilaika
wa aljatu zahri ilaika, raghbatan wa rahbatan ilaika, lamalja’a wa la manna mink a ill a ilaika.
Amantu bikitabi kalladhi anzalta wa bi nabiyyikal-ladhi arsalta’. If you should die then (after recit –
ing this) you will die on the religion of Islam (i.e., as a Muslim); so let these words be the last you say
(before going to bed)” While I was memorizing it, I said, “Wa birasiulikal-ladhi arsalta (in Your
Apostle whom You have sent).’ The Prophet said, “No, but say: Wa binabiyyi-kalladhi arsalta (in Your
Prophet whom You have sent).”