[We said], "And take in your hand a bunch [of grass] and strike with it and do not break your oath."[1329] Indeed, We found him patient, an excellent servant. Indeed, he was one repeatedly turning back [to Allāh].
Translator's notes
[1329] At a point during his illness, Job became angry with his wife and swore that if he recovered, he would punish her with one hundred lashes. According to Allāh's instruction, the oath was fulfilled by striking her once with one hundred blades of grass.
Another translation: Al-Hilali & Muhsin Khan · QuranEnc v1.1.2
44. "And take in your hand a bundle of thin grass and strike therewith (your wife), and break not your oath.[1] Truly! We found him patient. How excellent a slave! Verily he was ever oft-returning in repentance (to Us)!
[1] (V.38:44) During the ailment of Ayyûb (Job), his wife used to beg for him, and Satan told her a word of disbelief to say and she told her husband [Ayyûb (Job)]; so he became angry with her and took an oath to strike her one hundred lashes. So Allah ordered Ayyûb (Job) to fulfil his oath by striking her with the bundle of thin grass. (Tafsîr Al-Qurtubi,).