(Violating Your Oath: A Serious Offense)
Do not abuse the oaths among you, lest you slide back after having a strong foothold, then you incur misery. Such is the consequence of repelling from the path of God (by setting a bad example); you incur a terrible retribution.
وَلا تَتَّخِذوا أَيمٰنَكُم دَخَلًا بَينَكُم فَتَزِلَّ قَدَمٌ بَعدَ ثُبوتِها وَتَذوقُوا السّوءَ بِما صَدَدتُم عَن سَبيلِ اللَّهِ وَلَكُم عَذابٌ عَظيمٌ
wa laa tattakhizooo aimaanakum dakhalam bainakum fatazilla qadamum ba’da subootihaa wa tazooqus sooo’a bima sadattum ‘an sabeelil laahi wa lakum ‘azaabun ‘azeem