Sunan an-Nasa'i 4954
سنن النسائي#4954Not gradedIt was narrated that Ka'b said:"Whoever performs wudu and performs wudu, well, then prays ('Abdur-Rahman said: and prays Isha), then prays after that four Rakahs and does them well (Sawwar said: and understands what he is reciting (Sawwar said: and recites therein), they will be equivalent to (praying) Lailat Al-Qadr for him". (Hasan Maqtu)
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahMaqtu
Al-AlbaniMaqtu
In-book reference: 46:84