Sahih al-Bukhari 4734
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
The Statement of Allah the Most High: "Say (O Muḥammad ﷺ): 'Shall We tell you the greatest losers in respect of (their) deeds?" (V.18:103)
Narrated Masruq: Khabbab said, "During the pre-lslamic period, I was a blacksmith and Al-Asi bin Wail owed me a debt." So Khabbab went to him to demand the debt. He said, "I will not give you (your due) till you disbelieve in Muhammad." Khabbab said, "By Allah, I shall not disbelieve in Muhammad till Allah makes you die and then resurrects you." Al-Asi said, "So leave me till I die and then be resurrected, for I will be given wealth and children whereupon I will pay you your debt." So this Verse was revealed:-- 'Have you seen him who disbelieved in Our Signs and, (yet) says: I shall certainly be given wealth and children.' (19:77)