Allah 's Apostle said, " I have been ordered to fight with the people till they say, 'None has the right to be worshipped but Allah,' and whoever says, 'None has the right to be worshipped but Allah,' his life and property will be saved by me except for Islamic law, and his accounts will be with Allah, (either to punish him or to forgive him.)"
Sahih al-Bukhari Book 56, Hadith 158
← Previous Hadith 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."

Sahih al-Bukhari Book 56, Hadith 157 Next Hadith → Whenever Allah's Messenger (ﷺ) intended to lead a Ghazwa, he would use an equivocation from which one would understand that he was going to a different destination .

Sahih al-Bukhari Book 56, Hadith 159