He said...
He said: "Our Lord: I have settled some of my posterity in an uncultivable valley near Your Holy House so that they may establish prayers." (Surah Ibrahim, 14:37) Command to Slaughter His Son More astonishing than these events is the story of Prophet Ibrahim's slaughtering his son at Mina. It is in memory of this extraordinary self-surrender that we now sacrifice goats and sheep.
(As we perform what we have been told by Allah, there can be no question of why and what for in this connection.) After seeing two or three times in dream as if he was sacrificing his son, Ibrahim was convinced that it was Allah's Command to him to do so. He told his son about it. His son readily agreed and said: Father, do that which you are commanded. Allah willing you will find me of the steadfast. The Qur'an depicts a wonderful picture.
When they had both surrendered (to Allah) and he had flung him down upon his face. (At last when Ibrahim was absolutely sure that he would cut off the head of his son, and Isma'il had no doubt in his mind that his head would be severed: We called to him: Ibrahim, you have already fulfilled the vision. (Surah as-Saffat, 37:102-105). What Allah says is that He did not actually want Isma'ils head to be cut off.
He only wanted to see that Ibrahim and Isma'il showed their complete submission to His will, which they did. The Quran expressly says that Allah gave a son to Prophet Ibrahim in his old age. It says when the angels came to him and told him that he would be granted a son by Allah, his wife said: "Shall I bear a child when I am an old woman and this my husband is an old man? The angels said to her: Do you wonder at the commandment of Allah?
The mercy of Allah and His blessings be upon you, people of the house." (Surah Hud, 11:72-73) According to this verse Allah gave a child to Ibrahim when he was an old man. So long as he was young, he did not have any child. When he got a child, he was already a Prophet. In the Qur'an there are fairly a large number of verses about Ibrahim. They show that he got a child towards the end of his life when he was seventy or eighty years old.
After that also he lived for ten or twenty years more, Ishaq and Isma'il both grew up during his lifetime. Isma'il becomes so mature to help his father build the Ka'bah. The Qur'an says: "And (remember) when his Lord tried Ibrahim with his commands, and he fulfilled them. He said: I have appointed you an Imam for mankind. Ibrahim said: And of my offspring?