וַתְּהִ֨י הַתְּשֻׁעָ֜ה בַּיּ֥וֹם הַה֛וּא לְאֵ֖בֶל לְכָל־הָעָ֑ם כִּֽי־שָׁמַ֣ע הָעָ֗ם בַּיּ֤וֹם הַהוּא֙ לֵאמֹ֔ר נֶעֱצַ֥ב הַמֶּ֖לֶךְ עַל־בְּנֽוֹ׃
And the victory that day was turned into mourning unto all the people; for the people heard say that day: ‘The king grieveth for his son.’
Read halakhic rulings (Jewish law) on II Samuel 19:3 from the Mishneh Torah and classical halakhic sources, free online.