King James Version (KJV)
And Benaiah the son of Jehoiada answered the king, and said, Amen: the LORD God of my lord the king say so {too}.
Modern English
Benaiah the son of Jehoiada answered the king, and said, “Amen. May Yahweh, the God of my lord the king, say so.
Hebrew
וַיַּ֨עַן בְּנָיָ֧הוּ בֶן־יְהֽוֹיָדָ֛ע אֶת־הַמֶּ֖לֶךְ וַיֹּ֣אמֶר ׀ אָמֵ֑ן כֵּ֚ן יֹאמַ֣ר יְהוָ֔ה אֱלֹהֵ֖י אֲדֹנִ֥י הַמֶּֽלֶךְ׃
vayaʿan bnayahv ben-yhvoyadaʿ ʾet-hamelek vayoʾmer ׀ ʾamen ken yoʾmar yhvah ʾelohey ʾadoniy hamelek