Mishkat al-Masabih #2058

Jabir said it was the Prophet’s custom not to go to sleep till he had recited “A. L. M The sending down,” (Qur’ān, 32) and “Blessed is He in whose hand is the kingdom.” Ahmad, Tirmidhī and Dārimī transmitted it, Tirmidhī saying this is a sahīh tradition. The same is said in Sharh as-sunna, but in al-Masābīh it is called gharīb.