The Book of Greetings
وَحَدَّثَنَاهُ إِسْحَاقُ بْنُ إِبْرَاهِيمَ الْحَنْظَلِيُّ، أَخْبَرَنَا عَبْدُ اللَّهِ بْنُ الْحَارِثِ، عَنِ ابْنِ، جُرَيْجٍ أَخْبَرَنِي أَبُو الزُّبَيْرِ، أَنَّهُ سَمِعَ جَابِرًا، يُخْبِرُ عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ " إِنْ كَانَ فِي شَىْءٍ فَفِي الرَّبْعِ وَالْخَادِمِ وَالْفَرَسِ " .Jabir reported Allah's Messenger (ﷺ) as saying:If bad luck were to be in anything, it is found in the land, in the servant and in the horse
From Sahih Muslim, whose reports the scholars accept as authentic.