Surah An-Nahl 16:94

وَلَا تَتَّخِذُوٓا۟ أَيْمَـٰنَكُمْ دَخَلًۢا بَيْنَكُمْ فَتَزِلَّ قَدَمٌۢ بَعْدَ ثُبُوتِهَا وَتَذُوقُوا۟ ٱلسُّوٓءَ بِمَا صَدَدتُّمْ عَن سَبِيلِ ٱللَّهِ ۖ وَلَكُمْ عَذَابٌ عَظِيمٌ

And do not take your oaths as [means of] deceit between you, lest a foot slip after it was [once] firm, and you would taste evil [in this world] for what [people] you diverted from the way of Allāh, and you would have [in the Hereafter] a great punishment.

Translation: Saheeh International

Tafsir

And do not make your oaths a means of deceit between you — He repeats this here for emphasis — lest a foot should slip that is lest your feet should slip off the path of Islam after being steady having been set upon it and lest you should taste evil that is chastisement forasmuch as you barred people from the way of …

Excerpt from Tafsir al-Jalalayn, commentary on 16:94, via Quran.com. The reader has the full commentary and 9 more tafsirs.