س ھ رs-h-r
(س) سَهِرَ يَسْهَرُ سَهَرًاsahira yasharu saharan: to stay awake at night, to be sleepless.
سَاهِرَةٌsāhirah (feminine active participle, ism fāʿil): wakeful; the exegetes have mentioned several meanings at this place: the level plain of the earth where people will be raised up, or the place where there is no sleep. ﴿فَاِذَا هُمْ بِالسَّاهِرَةِ﴾ (An-Nāziʿāt 79:14)Only once in the Quran.