וְהָיָה֙ בִּקְרָב־אִ֔ישׁ לְהִשְׁתַּחֲוֺ֖ת ל֑וֹ וְשָׁלַ֧ח אֶת־יָד֛וֹ וְהֶחֱזִ֥יק ל֖וֹ וְנָ֥שַׁק לֽוֹ׃
And it was so, that when any man came nigh to prostrate himself before him, he put forth his hand, and took hold of him, and kissed him.
Read halakhic rulings (Jewish law) on II Samuel 15:5: and classical halakhic sources.