וַיִּקַּ֤ח אַבְרָהָם֙ צֹ֣אן וּבָקָ֔ר וַיִּתֵּ֖ן לַאֲבִימֶ֑לֶךְ וַיִּכְרְת֥וּ שְׁנֵיהֶ֖ם בְּרִֽית׃
And Abraham took sheep and oxen, and gave them unto Abimelech; and they two made a covenant.
Read halakhic rulings (Jewish law) on Genesis 21:27: and classical halakhic sources.