On the eighth day, they came to circumcise the child and were calling him Zachariah after his father. But his mother intervened: “No. He is to be called John.”
“Then he made a covenant with him and signed it in Abraham’s flesh by circumcision. When Abraham had his son Isaac, within eight days he reproduced the sign of circumcision in him. Isaac became father of Jacob, and Jacob father of twelve ‘fathers,’ each faithfully passing on the covenant sign.