وَخُذْ بِيَدِكَ ضِغْثًا فَاضْرِبْ بِّهٖ وَلَا تَحْنَثْ ۗاِنَّا وَجَدْنٰهُ صَابِرًا ۗنِعْمَ الْعَبْدُ ۗاِنَّهٗٓ اَوَّابٌ ( ص: ٤٤ )
Wa khuz biyadika dighsan fadrib bihee wa laa tahnas, innaa wajadnaahu saabiraa; ni'mal 'abd; innahooo awwaab (Ṣād 38:44)
[We said], "And take in your hand a bunch [of grass] and strike with it and do not break your oath." Indeed, We found him patient, an excellent servant. Indeed, he was one repeatedly turning back [to Allah]. (Sad  : 44)
1 Mufti Taqi Usmani
And (We said to him,) “Take (a bundle of) thin twigs in your hand, and strike with it, and do not violate your oath. Surely, We found him very enduring. He was really an excellent servant. Surely, he was great in turning (to Us, in penitence and praise).