question #1 Sahih al-Bukhari 2945, Book 56, Hadith 157 : What was the Prophet Muhammad’s (ﷺ) strategy regarding the timing of military engagements?

The Prophet (ﷺ) set out for Khaibar and reached it at night. He used not to attack if he reached the people
at night, till the day broke. So, when the day dawned, the Jews came out with their bags and spades.
When they saw the Prophet; they said, “Muhammad and his army!” The Prophet (ﷺ) said, Allahu–Akbar!
(Allah is Greater) and Khaibar is ruined, for whenever we approach a nation (i.e. enemy to fight) then
it will be a miserable morning for those who have been warned.”