Al-Ash'ath bin Qais said: "It is about me, by Allah! There was a dispute about some land between myself and a man from the Jews who denied my ownership of it, so I took him to the Prophet (ﷺ). The Messenger of Allah (ﷺ) said to me: 'Do you have any proof ?' I said: 'No'. So he said to Jew: 'Take an oath.' I said: 'O Messenger of Allah! If he takes an oath then my property will be gone!' So Allah, Most High revealed: Verily those who purchase a small gain at the cost of Allah's Covenant and their oaths.. until the end of the Ayah."
[Abu 'Eisa said:] There are narrations on this topic from Wa'il bin Hujr, Abu Musa, Abu Umamah bin Tha'labah Al-Ansari, and 'Imran bin Husain. The Hadith of Ibn Mas'ud is a Hasan Sahih Hadith.
In-book : Book 14, Hadith 71
English translation : Vol. 1, Book 12, Hadith 1269