He (the Holy Prophet) shortened the prayer and he did not pray like these people then, and he informed me that the Messenger of Allah (ﷺ) used to recite" Qaf. By the (Glorious) Qur'an," and a passage of similar length.
Sahih Muslim Book 4, Hadith 190
← Previous Hadith The Apostle of Allah (ﷺ) used to recite in the morning prayer" Qaf. By the Glorious Quran." and his prayer afterward shortened.

Sahih Muslim Book 4, Hadith 189 Next Hadith → The Apostle of Allah (ﷺ) used to recite in the noon prayer:" By the night when it envelopes" (xcii.), and in the afternoon like this, but he prolonged the morning prayer as compared to that (noon and afternoon prayers).

Sahih Muslim Book 4, Hadith 191