Genesis 19:13

for we will destroy this place, because the cry of them is waxen great before the face of the Lord; and the Lord hath sent us to destroy it. In their capacity of protecting servants to the children of God, the angels now bid Lot bring any relatives that he may have in the city out as quickly as possible, in case there should be a son-in-law, and then any sons and daughters. This order they substantiate with a definite reference to the destruction of the city which they had been given charge of.