וַיַּ֨עַן בְּנָיָ֧הוּ בֶן־יְהֽוֹיָדָ֛ע אֶת־הַמֶּ֖לֶךְ וַיֹּ֣אמֶר ׀ אָמֵ֑ן כֵּ֚ן יֹאמַ֣ר יְהוָ֔ה אֱלֹהֵ֖י אֲדֹנִ֥י הַמֶּֽלֶךְ׃
At sumagot si Benaias na anak ni Joiada sa hari, at sinabi: “Amen! Gayon nawa ang sabihin ng Walang-Hanggan, ang Diyos ng aking panginoong hari.
Mesillat Yesharim
Our sages of blessed memory roused us to the truth of this matter in reference to the coronation of Shlomo. David told Beniyahu (in Melachim 1:33-36) "take him down to Gihon". Beniyahu replied: "Amen, may G-d say so [too]".