(41) باب فِي الأَذَانِ قَبْلَ دُخُولِ الْوَقْتِ
Narrated Bilal:
The Messenger of Allah (ﷺ) said to Bilal: Do not call adhan until the dawn appears clearly to you in this way, stretching his hand in latitude.Abu Dawud said: Shaddad did not see Bilal.
Reference: Sunan Abi Dawud 534
In-book reference: Book 2, Hadith 144
English translation: Book 2, Hadith 534