Al-Kāfi

Hadith 1784
أحمد بن محمد، عن ابن أبي عمير، عن هشام بن الحكم، عن أبي عبدالله عليه السلام قال: من أدرك المشعر الحرام وعليه خمسة من الناس فقد فقد أدرك الحج.
5. Ahmad ibn Muhammad from has narrated from Ibn Abi ‘Umayr from Hisham ibn al-Hakam who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘One who attends al-Mash‘ar al-Haram (the sacred area) when five people are still there, he is considered, as having attended al-Hajj. ‘“
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī