Al-Kāfi - Volume 4 > Feeling and Touching (of al-Ka‘bah)
Hadith #1

1ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ عَنْ صَفْوَانَ بْنِ يَحْيَى عَنْ يَعْقُوبَ بْنِ شُعَيْبٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ السَّلاَم) عَنِ اسْتِلامِ الرُّكْنِ قَالَ اسْتِلامُهُ أَنْ تُلْصِقَ بَطْنَكَ بِهِ وَالْمَسْحُ أَنْ تَمْسَحَهُ بِيَدِكَ.

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, ‘Alayhi al-Salam, 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.’”