I Samuel 19:4 Halakhah

וַיְדַבֵּ֨ר יְהוֹנָתָ֤ן בְּדָוִד֙ ט֔וֹב אֶל־שָׁא֖וּל אָבִ֑יו וַיֹּ֣אמֶר אֵ֠לָיו אַל־יֶחֱטָ֨א הַמֶּ֜לֶךְ בְּעַבְדּ֣וֹ בְדָוִ֗ד כִּ֣י ל֤וֹא חָטָא֙ לָ֔ךְ וְכִ֥י מַעֲשָׂ֖יו טוֹב־לְךָ֥ מְאֹֽד׃

And Jonathan spoke good of David unto Saul his father, and said unto him: ‘Let not the king sin against his servant, against David; because he hath not sinned against thee, and because his work hath been very good towards thee;

Read halakhic rulings (Jewish law) on I Samuel 19:4: and classical halakhic sources.