(1) باب صَلاَةِ الْمُسَافِرِينَ وَقَصْرِهَا
Anas b. Malik is reported to have said:
I observed four rak'ahs in the noon prayer with the Messenger of Allah (ﷺ) at Medina, and said two rak'ahs in the afternoon prayer at Dhu'l-Hulaifa. (ID)
Reference (ID): Sahih Muslim 690 b (ID)
In-book reference (ID): Book 6, Hadith 13 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1470 (ID)