When Allah Apostle was in Ta'if (trying to conquer it), he said to his companions, "Tomorrow we will
return (to Medina), if Allah wills." Some of the companions of Allah's Messenger (ﷺ) said, "We will not
leave till we conquer it." The Prophet (ﷺ) said, "Therefore, be ready to fight tomorrow." On the following
day, they (Muslims) fought fiercely (with the people of Ta'if) and suffered many wounds. Then
Allah's Messenger (ﷺ) said, "Tomorrow we will return (to Medina), if Allah wills." His companions kept
quiet this time. Allah's Messenger (ﷺ) then smiled.
Sahih al-Bukhari Book 78, Hadith 114