In the third aliyah the angels arrive in Sodom and Avrohom's nephew Lot is waiting at the gate of the city looking for guests, as he learned from his uncle Avrohom.
Lot brings the guests into his house to stay. Unfortunately word of his guests spread, and the people of the city surrounded Lot's house. They demand the guests so they can harm them. Lot refuses. The angels take Lot and his wife and daughters outside the city and tell them to escape to the mountain before the city is destroyed.