“Would you destroy them even if there are a hundred faithful believers among them?”

Imams says that Allah sent four angels to destroy the people of Lut: Archangel Gabriel, Mika’il, Israfil and Karubeel. The angels came to Ibrahim dressed in turbans and saluted him. Ibrahim did not recognize them but due to their elegant appearance said he would serve them himself. Being a good host he sacrificed a young calf for his guests. When it was cooked well he served it to his visitors but they paid no heed to it. Ibrahim became fearful. Archangel Gabriel took off his turban and Ibrahim recognized him. “Are your Archangel Gabriel?” asked Ibrahim. “Yes” replied Archangel Gabriel. Meanwhile Sarah entered and Archangel Gabriel gave them glad tidings of Ishaq and Ya‘qub. Ibrahim then asked them the purpose of their visit. “To destroy Lut’s people,” they replied.
“Would you destroy them even if there are a hundred faithful believers among them?”
“No.”
“If there are fifty believers?”
“Not even then.”
“What if there are thirty believers?”
The reply was still negative. “And if there are nearly 20 of them?”
“No” replied the angel.
“Would you destroy them if there are only 5 believers?”
“No.” Finally Ibrahim asked what the angels would do if there is only a single believer among the people. When they still replied in the negative, Ibrahim said that Lut was present among them. “We know better that he is present there,” said the angels. “No harm would come to him or his family except his wife.”