It 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)