A man called Ramila had fever. It was the prayer time so he barely did ablution and went to mosque to say the prayer. After the prayer when he was leaving the mosque, he saw The Commander Of The Faithful while his hand was on Ramila shoulder. Imam said: Ramila! You had a bad fever but you also came to mosque for prayer. Ramila was surprised. “Yes my master but how did you know that?” Ramila said. The Commander Of The Faithful smiled and said: O Ramila, there is no any sick faithful man or women unless we get sick due to his or her illness and when s\he get upset we will get upset too and when he bless we will comply him\her and when s\he will be silent we will bless him\her and we will accompany any faithful man or women throughout the world.
source : sibtayn