Sunan Abi Dawud 1253
سنن أبي داود#1253SahihNarrated 'Aishah:The Prophet (ﷺ) never omitted four rak'ahs before the noon prayer, and two rak'ahs before the dawn prayer
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (1182)
In-book reference: 5:4