ذَٰلِكَ أَدْنَىٰ أَنْ يَأْتُوا بِالشَّهَادَةِ عَلَىٰ وَجْهِهَا أَوْ يَخَافُوا أَنْ تُرَدَّ أَيْمَانٌ بَعْدَ أَيْمَانِهِمْ ۗ وَاتَّقُوا اللَّهَ وَاسْمَعُوا ۗ وَاللَّهُ لَا يَهْدِي الْقَوْمَ الْفَاسِقِينَ

Surah Al-Maidah : 108
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 Allah and listen; and Allah does not guide the defiantly disobedient people.

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