´It was narrated that Ibn 'Abbas said:` "The Messenger of Allah passed by a man who was leading another man by a rope. The Prophet took it, and cut it, and he said: 'It is a vow.'"
Hadith ReferenceSunan an-Nasa'i / The Book of Oaths and Vows / Hadith: 3841
Hadith Gradingالألبانی:صحيح خ دون قوله إنه نذر | زبیر علی زئی:حسن