וַיֹּ֤אמֶר דָּוִד֙ אֶל־יְה֣וֹנָתָ֔ן מִ֖י יַגִּ֣יד לִ֑י א֛וֹ מַה־יַּעַנְךָ֥ אָבִ֖יךָ קָשָֽׁה׃ (ס)
Then said David to Jonathan: ‘Who shall tell me if perchance thy father answer thee roughly?’
Read halakhic rulings (Jewish law) on I Samuel 20:10: and classical halakhic sources.