Yes he did, and he was a very old man when he did, too! You can tell from this that he truly cared for God- most people wouldn't be willing to do that!
Yes, Abraham was 99 when circumcised. His son, Ishmael, was 13 at the time.
It's in the Torah, the Jewish Bible.
According to the account recorded in the Torah and translated in Genesis, Abraham did nothing "to" either of his sons except circumcise them.
God commanded Abraham to circumcise himself and his male descendants (see Genesis ch.17), and He promised to give Abraham the holy land (Genesis ch.15). Abraham is not quoted there as having verbally promised anything, but from Genesis 18:19 it is clear that he undertook to raise a family that would serve God and go in His ways.
Abraham had to circumcise himself to show his loyalty to God. God in return promised the land of Canaan to his descendants given him by Sarah (i.e. Isaac) and that both Isaac and Ishmael would father nations that would be as numerous as the stars in the sky or grains of sand on the ground.
The commandment of circumcision was in place, and Abraham was circumcised, about a year before Isaac was born. So Isaac was circumcised shortly after his birth, with no repetition of the commandment required.
Circumcise Me was created in 2008.
Abraham Lincoln did not intentionally sacrifice himself. He did what he thought was right for the country.
No law was ever "shown" to Abraham. Tradition holds that G-d spoke to Abraham and revealed himself, and Abraham worked out for himself how to worship G-d.
The Bible does not mention who chose Abraham's wife.
yes he taught himself many things
No