I saw Abul Hassan Al-Ridha (s) when he wanted to leave the ‘Umra (minor pilgrimage) and had come to the position at the head of the Prophet’s (s) tomb after the evening prayer. He (s) sent his best to the Prophet (s) and touched the tomb. Then he (s) left, went to a corner and started to say prayers. He (s) touched one of the pillars of the shrine ahead of the pillar that is at the position of the (Prophet’s) head with his left shoulder. Then he (s) said six or eight units of prayers wearing his sandals. The duration of his stay in the positions of bowing down or prostrating was nearly the time required to recite the glorifications of God thrice or more. When Abul Hassan Al-Ridha (s) finished saying the prayers, he (s) fell down in prostration for so long that the pebbles got wet with the moisture from his sweat. Some of his companions have said that the Imam (s) rubbed his face on the ground of the Mosque.”