This is indicated by the conversation between Ibrahim, the "friend" of Allah, and the angels who visited him. Allah says (interpretation of the meaning): "Then he turned quickly to his household, brought out a fatted calf, and placed it before them. He said, ‘Will you not eat?’ (When they did not eat), he conceived a fear of them. They said: ‘Fear not,’ and they gave him glad tidings of a son endowed with knowledge." [51:26-28] Elsewhere, Allah says (interpretation of the meaning): "But when he [Ibrahim] saw their hands went not towards the (meal), he felt some mistrust of them, and conceived a fear of them. They said: ‘Fear not: we have been sent against the people of Lut.’" [11:70]