Surah Sad 38:44

وَخُذْ بِيَدِكَ ضِغْثًا فَٱضْرِب بِّهِۦ وَلَا تَحْنَثْ ۗ إِنَّا وَجَدْنَـٰهُ صَابِرًا ۚ نِّعْمَ ٱلْعَبْدُ ۖ إِنَّهُۥٓ أَوَّابٌ

[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 Allāh].

Translation: Saheeh International

Tafsir

And We said to him ‘Take in your hand a bunch of twigs or some blades of grass and smite therewith your wife — for he had sworn to smite her a hundred times on one occasion when she was late in coming to him — and do not break your oath’ by not smiting her so he took a hundred rushes and smote her with them once and …

Excerpt from Tafsir al-Jalalayn, commentary on 38:44, via Quran.com. The reader has the full commentary and 9 more tafsirs.