Hadith 197
Narrated Anas ibn Malik: The Messenger of Allah ﷺ drank some milk and he did not rinse his mouth nor did he perform ablution, and he offered the prayer.
Hadith 2336
Narrated Umm Salamah, Ummul Muminin: She never saw the Prophet ﷺ fasting the whole month except Sha'ban which he combined with Ramadan.