´It was narrated that Jabir bin Samurah said:` "The Prophet (ﷺ) used to recite "By the night as it envelops" in Zuhr and something similar in 'Asr, and he would recite something longer than that in subh."
Related hadith on this topic
Explanation & Benefits
Hafiz Muhammad Ameen
981. Commentary: Regarding the recitation (qira’ah) in Dhuhr and ‘Asr, various ahadith have been narrated. There is no contradiction among them; rather, the meaning of all these narrations is that the Prophet (sallallahu alayhi wa sallam) would recite with a moderate recitation in Dhuhr and ‘Asr, that is, neither very long nor very short. And in the Fajr prayer, he would recite at length. And Allah knows best.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 981
Shaykh Dr. Abdur Rahman Freywai
1:
From Surah Al-Buruj to Surah Lam Yakun is the middle section of the Mufassal.
2:
And from Lam Yakun to the end is the short section of the Mufassal.
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 307