Al-Ma'idah 5:108

ذَٰلِكَ أَدْنَىٰٓ أَن يَأْتُوا۟ بِٱلشَّهَـٰدَةِ عَلَىٰ وَجْهِهَآ أَوْ يَخَافُوٓا۟ أَن تُرَدَّ أَيْمَـٰنٌۢ بَعْدَ أَيْمَـٰنِهِمْ ۗ وَٱتَّقُوا۟ ٱللَّهَ وَٱسْمَعُوا۟ ۗ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلْفَـٰسِقِينَ

Dhālika adnā an yatū bil-shahādati ʿalā wajhihā aw yakhāfū an turadda aymānun baʿda aymānihim wa-ittaqū l-laha wa-is'maʿū wal-lahu lā yahdī l-qawma l-fāsiqīna

That is more likely that they will give testimony according to its [true] objective, or [at least] they would fear that [other] oaths might be taken after their oaths. And fear Allāh and listen [i.e., obey Him]; and Allāh does not guide the defiantly disobedient people.