Kissing the loved ones

Tuhuf al uqool

وقال عليه السلام: قبلة الام على الفم. وقبلة الاخت على الخد. وقبلة الامام بين عينيه

And said [Imam al Redha] :  "The mother is kissed on the mouth, and the sister is kissed on the cheek, and the Imam is kissed between his eyes."