וַיְהִ֣י ׀ כְּכַלּ֣וֹת דָּוִ֗ד לְדַבֵּ֞ר אֶת־הַדְּבָרִ֤ים הָאֵ֙לֶּה֙ אֶל־שָׁא֔וּל וַיֹּ֣אמֶר שָׁא֔וּל הֲקֹלְךָ֥ זֶ֖ה בְּנִ֣י דָוִ֑ד וַיִּשָּׂ֥א שָׁא֛וּל קֹל֖וֹ וַיֵּֽבְךְּ׃
And it came to pass, when David had made an end of speaking these words unto Saul, that Saul said: ‘Is this thy voice, my son David?’ And Saul lifted up his voice, and wept.
Read halakhic rulings (Jewish law) on I Samuel 24:17: and classical halakhic sources.