וַיִּמָּלֵ֣ט בֵּן־אֶחָ֗ד לַאֲחִימֶ֙לֶךְ֙ בֶּן־אֲחִט֔וּב וּשְׁמ֖וֹ אֶבְיָתָ֑ר וַיִּבְרַ֖ח אַחֲרֵ֥י דָוִֽד׃
And one of the sons of Ahimelech the son of Ahitub, named Abiathar, escaped, and fled after David.
Read halakhic rulings (Jewish law) on I Samuel 22:20: and classical halakhic sources.