Sunan an-Nasa'i 1666
سنن النسائي#1666SahihIt was narrated from Ya'la bin Ata that he heard Ali Al-Azdi (say) that he heard Ibn Umar narrate that:The Prophet (ﷺ) said: "The prayers of the night and day are two by two
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 20:69