King James Version (KJV)
But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of the LORD'S oath that {was} between them, between David and Jonathan the son of Saul.
Modern English
But the king spared Mephibosheth, the son of Jonathan the son of Saul, because of Yahweh’s oath that was between them, between David and Jonathan the son of Saul.
Hebrew
וַיַּחְמֹ֣ל הַמֶּ֔לֶךְ עַל־מְפִי־בֹ֖שֶׁת בֶּן־יְהוֹנָתָ֣ן בֶּן־שָׁא֑וּל עַל־שְׁבֻעַ֤ת יְהוָה֙ אֲשֶׁ֣ר בֵּֽינֹתָ֔ם בֵּ֣ין דָּוִ֔ד וּבֵ֖ין יְהוֹנָתָ֥ן בֶּן־שָׁאֽוּל׃
vayaḥmol hamelek ʿal-mpiy-boshet ben-yhvonatan ben-shaʾvl ʿal-shbuʿat yhvah ʾasher beynotam beyn david vbeyn yhvonatan ben-shaʾvl