Tidings of Isaac
In the meantime, three angels descended to the earth: Gabriel, Israphael, and Michael. They came in human shape and saluted Abraham. Abraham arose and welcomed them. He took them inside his tent, thinking they were strangers and guests. He seated them and made sure that they were comfortable, then excused himself to go to his people.
His wife Sarah arose when he entered. She had become old and white-haired. Abraham said to her: "We have three strangers in the house." "Who are they?" she asked. "I do not know any of them," he answered. "What food have we got?" Abraham asked. "Half a sheep," she replied. "Half a sheep! Slaughter a fat calf for them; they are strangers and guests," he ordered while leaving.
The servants roasted and served a calf. Abraham invited the angels to eat, and he started eating so as to encourage them. He continued, but when he glanced at his guests to assure they were eating, he noticed that none of them had touched the food. He said to them: "Are you not going to eat?" He resumed eating, but when he glanced at them again he found that they were still not eating. Their hands did not reach out for the food. He began to fear them.
Abraham's fears increased. The angels, however, were reading his inner thoughts and one of them said: "Do not fear." Abraham raised his head and replied: "Indeed, I am in fear. I have asked you to eat food, but you do not stretch out your hands to eat. Do you intend me evil?"
One of the angels smiled and said: "We do not eat. We are Allah's angels." One of them then turned towards his wife and conveyed the glad tidings about Isaac (Ishaaq).



Tidings of Isaac - Qur'anic
Almighty Allah revealed: And verily, there came Our Messengers to Abraham with glad tidings. They said: "Salaam (greetings or peace)!" He answered: "Salaam (greetings or peace)" and he hastened to entertain them with a roasted calf. But when he saw their hands went not towards it (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 Lot." And his wife was standing (there), and she laughed (either, because the Messengers did not eat their food or for being glad for the destruction of the people of Lot). But We gave her glad tidings of Isaac, and after him, of Jacob.
She said (in astonishment): "Woe unto me! Shall I bear a child while I am an old woman, and here is my husband, an old man? Verily! This is a strange thing!" They said: "Do you wonder at the Decree of Allah? The Mercy of Allah and His Blessings be on you, 0 the family (of Abraham). Surely, He (Allah) is All-Praiseworthy, All-Glorious." Surah 11: 69-73