וַיָּבֹ֨א אַבְנֵ֤ר אֶל־דָּוִד֙ חֶבְר֔וֹן וְאִתּ֖וֹ עֶשְׂרִ֣ים אֲנָשִׁ֑ים וַיַּ֨עַשׂ דָּוִ֧ד לְאַבְנֵ֛ר וְלַאֲנָשִׁ֥ים אֲשֶׁר־אִתּ֖וֹ מִשְׁתֶּֽה׃
So Abner came to David to Hebron, and twenty men with him. And David made Abner and the men that were with him a feast.
Read halakhic rulings (Jewish law) on II Samuel 3:20: and classical halakhic sources.