וַיָּשֶׂם֩ אֶת־נַפְשׁ֨וֹ בְכַפּ֜וֹ וַיַּ֣ךְ אֶת־הַפְּלִשְׁתִּ֗י וַיַּ֨עַשׂ יְהוָ֜ה תְּשׁוּעָ֤ה גְדוֹלָה֙ לְכָל־יִשְׂרָאֵ֔ל רָאִ֖יתָ וַתִּשְׂמָ֑ח וְלָ֤מָּה תֶֽחֱטָא֙ בְּדָ֣ם נָקִ֔י לְהָמִ֥ית אֶת־דָּוִ֖ד חִנָּֽם׃
for he put his life in his hand, and smote the Philistine, and the LORD wrought a great victory for all Israel; thou sawest it, and didst rejoice; wherefore then wilt thou sin against innocent blood, to slay David without a cause?’
Read halakhic rulings (Jewish law) on I Samuel 19:5: and classical halakhic sources.