Dua if unable to sleep at night

Allâhumma gharatin-nujâmu wa hada’atil uyunu wa anta hayyun qayyumun la ta’khudhuka sinatun wala nawm. Ya hayyu yâ qayyümu ahdi’ layli wa anim ayni.

O Allah, the stars have disappeared and the eyes (of people) have sunken (into deep slumber), And surely you are Everlasting and Eternal, neither sleep, nor slumber can seize you. O Everlasting and Eternal, bless my night with peace and my eyes with sleep. (Al-Nasai)