وَحَدَّثَنِي 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, "Isaw Abdullah ibn Umar stop by the grave of the Prophet, may Allahbless 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." Translation Not Available

Book Ref: Muwatta Imam Malik Book 9 Hadith 402
Web Ref:  Muwatta Imam Malik Book 9 Hadith 71

---