וַיִּטַּ֥ע אֶ֖שֶׁל בִּבְאֵ֣ר שָׁ֑בַע וַיִּ֨קְרָא־שָׁ֔ם בְּשֵׁ֥ם יְהוָ֖ה אֵ֥ל עוֹלָֽם׃
And Abraham planted a tamarisk-tree in Beer-sheba, and called there on the name of the LORD, the Everlasting God.
Read halakhic rulings (Jewish law) on Genesis 21:33: and classical halakhic sources.