That the Messenger of Allah (ﷺ) said: "Whoever swears about an oath and says: 'If Allah wills (Insha Allah), then there is no breaking of the oath against him."
Jami` at-Tirmidhi Book 20, Hadith 9
← Previous Hadith That the Prophet (ﷺ) said: "Whoever takes an oath, and then he sees that something else is better than it, then he should make atonement for his oath and then do it."

Jami` at-Tirmidhi Book 20, Hadith 8 Next Hadith → That the Messenger of Allah (ﷺ) said: "Whoever swears and says: 'If Allah wills (Insha Allah), then he will not have broken it."

Jami` at-Tirmidhi Book 20, Hadith 10