Hadith #1438 (Sunan Ibn Majah)
Book: Fasting
Narrator(s): Abdullah ibn Ja'far, Abu Ishaq al-Sabay'ai' أبو إسحاق السبيعي عمرو بن عبد الله, Ubaidullah bin 'Umar al-Qawariri عبيد الله بن عمر القواريري, Umar ibn al-Khattab, Umayr Mwla 'Umar bin al-Khtab عمير مولى عمر بن الخطاب, Zayd bin Abi Anisa زيد بن أبي أنيسة

“I asked Umm Salamah about a man who gets up in the morning when he is in a state of sexual impurity and wants to fast. She said: “The Messenger of Allah (ﷺ) used to get up in the morning in a state of sexual impurity after having intercourse, not from a wet dream, then he would take a bath and complete his fast.’”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-1438/