Volume 3, Book 34, Number 301:
Narrated ‘Abdullah bin Abu Aufa:
A man displayed some goods in the market and swore by Allah that he had been offered so much
for that, that which was not offered, and he said so, so as to cheat a Muslim. On that occasion the
following Verse was revealed: “Verily! Those who purchase a small gain at the cost of Allah’s coven –
ant and their oaths (They shall have no portion in the Hereafter ..etc.)’ (3.77)