Sahih Muslim Book 6, Hadith 23

The Messenger of Allah (ﷺ) said two rak'ahs at Mina, and Abu Bakr after him, and 'Umar after Abu Bakr, and 'Uthman at the beginning of his caliphate; then 'Uthman observed four rak'ahs, and when Ibn 'Umar prayed with the Imam, he said four rak'ahs, but when he observed prayer alone, he said two rak'ahs.

Previous Hadith

A hadith like this has been reported by Zuhri, with the same chain of transmitters, and in it mention was made of Mina only, but not of other places.

Sahih Muslim Book 6, Hadith 22
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A hadith like this has been narrated by the same chain of transmitters.

Sahih Muslim Book 6, Hadith 24