בראשית כא:ח פירוש: רש״י, רשב״ם, רד״ק והעמק דבר

ויגמל AND HE WAS WEANED — at the expiration of twenty- four months (Gittin 75b).

ויגמל, he was separated from depending on his mother’s nipples.

ויגדל הילד ויגמל , he stopped receiving mother’s milk. This occurred after he was 24 months old. This was the standard period that babies nursed at the breasts of their mothers.