النحل — An-Nahl Ayat 94
وَلَا تَتَّخِذُوْٓا اَيْمَانَكُمْ دَخَلًا ۢ بَيْنَكُمْ فَتَزِلَّ قَدَمٌۢ بَعْدَ ثُبُوْتِهَا وَتَذُوْقُوا السُّوْۤءَ بِمَا صَدَدْتُّمْ عَنْ سَبِيْلِ اللّٰهِ ۚوَلَكُمْ عَذَابٌ عَظِيْمٌ
Wa lā tattakhiżū aimānakum dakhalam bainakum fa tazilla qadamum ba‘da ṡubūtihā wa tażūqus-sū'a bimā ṣadattum ‘an sabīlillāh(i), wa lakum ‘ażābun ‘aẓīm(un).
"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 Allah, and you would have [in the Hereafter] a great punishment."