Sunan Abi Dawud 671
سنن أبي داود#671SahihNarrated Anas ibn Malik: The Prophet (ﷺ) said: Complete the front row, then the one that comes next, and if there is any incompleteness, let it be in the last row
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
In-book reference: 2:281