21:4 When his son Isaac was eight days old, 1 Abraham circumcised him just as God had commanded him to do. 2
1 tnHeb “Isaac his son, the son of eight days.” The name “Isaac” is repeated in the translation for clarity.
2 snJust as God had commanded him to do. With the birth of the promised child, Abraham obeyed the Lord by both naming (Gen 17:19) and circumcising Isaac (17:12).