﴿ تَتَجَافَىٰ جُنُوبُهُمْ عَنِ ٱلْمَضَاجِعِ يَدْعُونَ رَبَّهُمْ خَوْفًۭا وَطَمَعًۭا وَمِمَّا رَزَقْنَٰهُمْ يُنفِقُونَ ﴾

“[and] who are im­pelled to rise from their beds [at night] to call out to their Sustainer in fear and hope; and who spend on others out of what We provide for them as sus­tenance.”

(Who forsake their beds) after sleeping a little at night (to cry unto their Lord) to worship their Lord by means of the five daily prayers; it is also said that they forsake their beds in order to pray the last night prayer ('Isha'); it is also said that this means: they leave their beds after sleeping a little at night to perform supererogatory prayers (in fear) of Him and His chastisement (and hope) in Him and His mercy, (and spend) in charity (of what we have bestowed on them) of wealth.