Parallel
Genesis 21:4
Rahlfs Septuagint (1935) · Berean Standard Bible
περιέτεμεν δὲ Αβρααμ τὸν Ισαακ τῇ ὀγδόῃ ἡμέρᾳ καθὰ ἐνετείλατο αὐτῷ ὁ θεός
When his son Isaac was eight days old, Abraham circumcised him, as God had commanded him.