“Abu ‘Abd Allah (a.s.), has said that ’Amir al-Mu’minin (a.s.), has said, ‘Of the visitors who receive the greatest reward from Allah, the Majestic, the Glorious, is one whose visiting time is short, unless the patient likes otherwise and asks him to stay for a longer time.’ He has also said, ‘A visit is complete when one places his hand over the other hand or upon his forehead (as an expression of concern).”’