Sunan Abi Dawud 977
سنن أبي داود#977Sahihحَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ، حَدَّثَنَا شُعْبَةُ، بِهَذَا الْحَدِيثِ قَالَ " صَلِّ عَلَى مُحَمَّدٍ وَعَلَى آلِ مُحَمَّدٍ كَمَا صَلَّيْتَ عَلَى إِبْرَاهِيمَ " .
This tradition has also been reported by Shu’bah through a different chain of narrators. This version adds:Bless Muhammad and Muhammad’s family as Thou didst bless Abraham
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Bukhari (6357) Sahih Muslim (406)
In-book reference: 2:588