King James Version (KJV)
For thou shalt heap coals of fire upon his head, and the LORD shall reward thee.
Modern English
for you will heap burning coals on his head, and the LORD will reward you.
Hebrew
כִּ֤י גֶחָלִ֣ים אַ֭תָּה חֹתֶ֣ה עַל רֹאשׁ֑וֹ וַ֝יהוָ֗ה יְשַׁלֶּם לָֽךְ׃
kiy geḥaliym ʾatah ḥoteh ʿal roʾshvo vayhvah yshalem lak