While they were in the village, God sent 4 servants, bringing a message for Sarai, saying she would no longer be barren.
Sometime later, they gave birth to Isacc, whom they dedicated to God.
But soon, God decided to see how dedicated they were, and so, he asked Isacc, their only son to be sacrificed. Abraham was saddened, but he knew he had do do God's will.
So Abraham and Isacc set of to Mount Moriah, where the sacrifice was to be made, and Isacc carried the wood for the sacrifice.
But before Abraham could kill Isacc, an angel of the Lord appeared, and told Abraham to stop.
And God provided the sacrifice for Abraham and Isacc in the form of a ram.