Surah An-Naml, Verse 49
قَالُوا۟ تَقَاسَمُوا۟ بِٱللَّهِ لَنُبَيِّتَنَّهُۥ وَأَهْلَهُۥ ثُمَّ لَنَقُولَنَّ لِوَلِيِّهِۦ مَا شَهِدْنَا مَهْلِكَ أَهْلِهِۦ وَإِنَّا لَصَٰدِقُونَ
Translation — Sahih International
They said, "Take a mutual oath by Allah that we will kill him by night, he and his family. Then we will say to his executor, 'We did not witness the destruction of his family, and indeed, we are truthful.' "
Source
Kur'an-ı Kerim, Neml Suresi 27:49
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/27-suresi-49-ayet