Overall meaning :
Allah Almighty states that the angels came to Abraham and his wife Sarah to give them the glad tiding of the birth of their son Isaac and, after Isaac, of their grandson Jacob. They greeted him, saying, 'Peace be with you!’ 'Peace be with you!’ he replied, and he hastened to bring them a roasted calf. However, when he noticed that their hands did not reach out towards it to help themselves to the food, he found this rather strange and became apprehensive of them. The angels, perceiving fear on Abraham’s face, said to him, 'Do not be afraid. We are the angels of your Lord who has sent us to destroy the people of Lot. Abraham’s wife, Sarah, who was standing behind the screen listening to them, laughed in astonishment at what she heard; whereupon Allah gave her the glad tiding—through the angels—of the birth of Isaac and, after Isaac, of his son Jacob, peace on them.
'How can I bear a child when I am an aged woman, and this husband of mine is well advanced in years?’ she said in utter astonishment. 'It is a very strange thing indeed that a child should be born to such an aged couple!’ They said, 'Are you astonished at the command and decree of Allah? May Allah’s mercy and blessings be upon you, family of Abraham. He is worthy of all praise and glory, and so are His attributes and actions.’ When Abraham’s fear subsided and the good news of the birth of Isaac and Jacob had been conveyed to him, he began to plead with the angels for Lot’s people and argue with them concerning their destruction; for Abraham was indeed most clement—never desiring to hasten punishment—and most tender-hearted, who often humbly and earnestly called upon Allah and frequently turned to Him in all his affairs. 'Plead no more for lot’s people, Abraham,’ the angels told him, 'for they have become justly deserving of divine punishment, and your Lord’s command to destroy them has already gone forth. They will certainly be afflicted with a punishment that cannot be averted.’