A man kissed Imam Sadiq (a.s)'s hand. Imam Sadiq (a.s) said: “This is only allowed for the Prophet or those under special consideration of the Prophet.”
وعنه (عليه السلام) قال
قبل رجل يده، فقال: أما إن هذا لا يصلح إلا لنبي أو من أريد به النبي.
Similar narrations
Al-Kāfi #666“Once I went to see Abu ‘Abdillah (a.s.) and I held and kissed his hand and the Imam said, ‘This is only for the Holy Prophet or his...
Al-Kāfi #665“No one’s head or hand is kissed except those of the Messenger of Allah or one who is intended to be for the Messenger of Allah.”