Hadith.2513 - In a narration by Abu al-Husayn al-Asadi, may Allah (swt) be pleased with him, Imam Jafar ibn Muhammad Al-Sadiq (as) said: "Whoever embraces a pilgrim while the dust of the journey is still on them, it is as if they have touched the Black Stone."

Translation: Bab Ul Qaim Publications·Thaqalayn link·The Arabic above is the original.