It was narrated that Anas said:
"I went out with the Messenger of Allah (ﷺ) from Al-Madinah to Mekkah, and he continued to shorten his prayers, and he stayed there for ten days." (TR)
Reference (TR): Sunan an-Nasa'i 1438 (TR)
In-book reference (TR): Book 15, Hadith 6 (TR)
English translation (TR): Vol. 2, Book 15, Hadith 1439 (TR)