It was narrated that Abu Basrah Al-Ghifari said:
"The Messenger of Allah (ﷺ) led us in praying 'Asr in Al-Mukhammas. He said: 'This prayer was enjoined upon those who came before you, but they neglected it. Whoever prays it regularly will have a two-fold reward, and there is no prayer after it until the Shahid appears." And the Shahid is "the star." [1][1] This is a statement of one of the narrators, and Allah knows best.
English reference: Vol. 1, Book 6, Hadith 522
Arabic reference: Book 6, Hadith 526