וַיֹּ֤אמֶר יוֹאָב֙ לַעֲמָשָׂ֔א הֲשָׁל֥וֹם אַתָּ֖ה אָחִ֑י וַתֹּ֜חֶז יַד־יְמִ֥ין יוֹאָ֛ב בִּזְקַ֥ן עֲמָשָׂ֖א לִנְשָׁק־לֽוֹ׃
And Joab said to Amasa: ‘Is it well with thee, my brother?’ And Joab took Amasa by the beard with his right hand to kiss him.
Read kabbalistic (mystical) interpretation of II Samuel 20:9: and classical mystical sources.