Not graded
Hisn al-Muslim (Fortress of the Muslim) 110
((يَقْرَأُ ﴿الم﴾ تَنْزِيلَ السَّجْدَة ِ، وَتَبَارَكَ الَّذي بِيَدِهِ الْمُلْكُ)).
(The Prophet never used to sleep until he had recited Soorat As-Sajdah (chapter 32) and Soorat Al-Mulk (chapter 67).)
Cited in Hisn al-Muslim (Fortress of the Muslim) (No. 110).