Zayd bin Aslam زيد بن أسلم · The Book on Fasting

the Messenger of Allah said: "Three things do not break the fast of the fasting person: Cupping, vomiting, and the wet dream."

"I went to Anas bin Malik during Ramadan and he was about to travel. His mount was prepared for him, and he put on his traveling clothes, then he called for some food to eat, and I said to him: 'Is it Sunnah?' He said: 'It is Sunnah.' Then he rode."

"I went to Anas bin Malik during Ramadan" and he mentioned a similar narration (as no. 799).