An-Naml 27:49

Qaloo taqasamoo billahilanubayyitannahu waahlahu thumma lanaqoolanna liwaliyyihi mashahidna mahlika ahlihi wa-inna lasadiqoon

They said, "Take a mutual oath by Allāh 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.'"

They said, “Let us swear a mutual oath by Allah that we shall attack him (SāliH) and his family at night, then will say to his heir, ‘We did not witness the destruction of his family, and we are really truthful.’”