Surah An-Naml (The Ants), Verse 49

قَالُوْا تَقَاسَمُوْا بِاللّٰهِ لَنُبَیِّتَنَّهٗ وَاَهْلَهٗ ثُمَّ لَنَقُوْلَنَّ لِوَلِیِّهٖ مَا شَهِدْنَا مَهْلِكَ اَهْلِهٖ وَاِنَّا لَصٰدِقُوْنَ ۟

Qaaloo taqaasamoo billaahi lanubaiyitannahoo wa ahlahoo summaa lanaqoolana liwaliy yihee maa shahidnaa mahlika ahlihee wa innaa lasaadiqoon

“They said: "Swear a mutual oath by Allah that we shall make a secret night attack on him and his people, and that we shall then say to his heir (when he seeks vengeance): 'We were not present at the slaughter of his people, and we are positively telling the truth.'"”

Quran 27:49 (Yusuf Ali Translation)