´Abdullah bin Buraidah narrated that his father (Buraidah) said:` "Allah's Messenger would recite: By the sun and its brightness, or similar Surah for the latter Isha (prayer)."
´It was narrated from Abdullah bin Buraidah, from his father, that:` The Messenger of Allah (ﷺ) used to recite 'By the sun and its brightness' and similar surahs in Isha'.
Hafiz Muhammad Ameen
1000. Commentary: From these narrations, it is understood that reciting the middle-length mufassal surahs in the ‘Isha prayer is recommended (mustahabb).
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 1000