Reference: al-Bid’u wal-Muhdathaat wa maa laa asla lahu – Page 477
Question: I see some people, after shaking hands, they either kiss their hands or place it on their chest as a form of increased [brotherly] love, so is this permissible? Advice us, may Allaah reward you with much good.
Response: From what we know, there is no basis for this action in the Sharee’ah. Kissing the hand or placing it upon the chest after shaking hands has not been legislated. Instead, if one doing so believes it to draw him near to Allaah (Subhaanahu wa Ta’aala) then it is [considered] an innovation.