Hadith #2634 (Sunan Abi Dawud)
Book: Jihad (Kitab Al-Jihad)
Narrator(s): Abdul Malik bin Nawful عبد الملك بن نوفل بن مساحق, Sa'id bin Mnswr bin Sh'bh سعيد بن منصور بن شعبة, Sufyan bin 'Uyaynah سفيان بن عيينة
Grade: Sahih

Anas said “The Prophet (ﷺ) used to attack at the time of the dawn prayer and hear. If he heard a call to prayer, he would refrain from them, otherwise would attack (them).

Source: https://parallelquran.com/hadith/sunan-abi-dawud-2634/