Muwatta Malik 399
موطأ مالك#399Sahihوَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، قَالَ رَأَيْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ يَقِفُ عَلَى قَبْرِ النَّبِيِّ صلى الله عليه وسلم فَيُصَلِّي عَلَى النَّبِيِّ صلى الله عليه وسلم وَعَلَى أَبِي بَكْرٍ وَعُمَرَ .
Yahya related to me from Malik that Abdullah ibn Dinar said, "I saw Abdullah ibn Umar stop by the grave of the Prophet, may Allah bless him and grant him peace, and ask for blessings on the Prophet, may Allah bless him and grant him peace, and on Abu Bakr and Umar
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:
In-book reference: 9:74