וְכָל־הַשָּׂרִים֙ וְהַגִּבֹּרִ֔ים וְגַ֕ם כָּל־בְּנֵ֖י הַמֶּ֣לֶךְ דָּוִ֑יד נָ֣תְנוּ יָ֔ד תַּ֖חַת שְׁלֹמֹ֥ה הַמֶּֽלֶךְ׃
E todos os chefes, e os homens poderosos, e também todos os filhos do rei Davi se submeteram ao rei Salomão.
Ibn Ezra
And behold, the interpretation of bar is "son," as in (Proverbs 31:2): "What, my son (beri), and what, O son (bar) of my womb?" And so it is written [in verse 7], "You are My son (b'ni atah)." And the custom of nations in the world is to place their hands under the hand of the king (like the brothers of Solomon [showing submission, cf. (I Chronicles 29:24)]), or [for] the servant [to place his hand] under the thigh of his master [for an oath, cf. (Genesis 24:2)], or to kiss the king. And this custom [of kissing the ruler] exists until today in the land of India.