Surah An-Nahl · 16:91
وَأَوْفُوا بِعَهْدِ اللَّهِ إِذَا عَاهَدْتُمْ وَلَا تَنْقُضُوا الْأَيْمَانَ بَعْدَ تَوْكِيدِهَا وَقَدْ جَعَلْتُمُ اللَّهَ عَلَيْكُمْ كَفِيلًا ۚ إِنَّ اللَّهَ يَعْلَمُ مَا تَفْعَلُونَ
And be true to your bond with God whenever you bind yourselves by a pledge, and do not break [your] oaths after having [freely] confirmed them and having called upon God to be witness to your good faith: behold, God knows all that you do.
Read Surah An-Nahl 16:91: "And be true to your bond with God whenever you bind yourselves by a pledge, and do not break [your] oaths after having [..." Full Arabic text, English translation, and image generator.