Parallel
Genesis 21:8
Rahlfs Septuagint (1935) · Berean Standard Bible
καὶ ηὐξήθη τὸ παιδίον καὶ ἀπεγαλακτίσθη καὶ ἐποίησεν Αβρααμ δοχὴν μεγάλην ᾗ ἡμέρᾳ ἀπεγαλακτίσθη Ισαακ ὁ υἱὸς αὐτοῦ
So the child grew and was weaned, and Abraham held a great feast on the day Isaac was weaned.