1. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Safwan ibn Yahya from Ya’qub ibn Shu’ayb who has said the following:

“I once asked abu ‘ Abd Allah , about feeling the corner (of al-Ka‘bah). He (the Imam) replied, ‘Istilam (feeling) is touching it (the Black Stone) with your belly and al-Mash (touching) is wiping it with your hand.’”