That the Prophet (ﷺ) said: "Whoever vowed to obey Allah, then he should obey Him. And whoever vowed to disobey Allah, then he should not disobey Him."
Jami` at-Tirmidhi Book 20, Hadith 3
← Previous Hadith That the Prophet (ﷺ) said: "There is no vowing in disobedience to Allah, and its atonement is the atonement of an oath."

Jami` at-Tirmidhi Book 20, Hadith 2 Next Hadith → Another Chain with similar meanings.

Jami` at-Tirmidhi Book 20, Hadith 4