حَدَّثَنَا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ الْحِزَامِيُّ، أَنْبَأَنَا أَبُو الْجَعْدِ عَبْدُ الرَّحْمَنِ بْنُ عَبْدِ اللَّهِ، عَنْ كَثِيرِ بْنِ عَبْدِ اللَّهِ بْنِ عَمْرِو بْنِ عَوْفٍ الْمُزَنِيِّ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ يُبْدَأُ بِالْخَيْلِ يَوْمَ وِرْدِهَا ‏"‏ ‏.‏

It was narrated from Kathir bin 'Abdullah bin 'Amr bin 'Awf Al-Muzani, from his father, that his grandfather said: “The Messenger of Allah (PBUH) said: 'Start with the horses on the day that you bring (the animals to drink).' ” Translation Not Available

Book Ref: Sunan Ibn Majah Book 16 Hadith 2484
Web Ref:  Sunan Ibn Majah Vol 3 Book 16 Hadith 2484