أَخْبَرَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ، عَنْ أَبِيهِ، عَنْ جَابِرٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَقُولُ فِي صَلاَتِهِ بَعْدَ التَّشَهُّدِ " أَحْسَنُ الْكَلاَمِ كَلاَمُ اللَّهِ وَأَحْسَنُ الْهَدْىِ هَدْىُ مُحَمَّدٍ صلى الله عليه وسلم " .
It was narrated from Jabir that: The Messenger of Allah (PBUH) used to say in his prayer, after the tashahhud: "The best of word is the word of Allah (SWT) and the best of guidance is the guidance of Muhammad (PBUH)." Translation Not Available
Book Ref: Sunan An Nisai Book 13 Hadith 1311
Web Ref: Sunan An Nisai Vol 2 Book 13 Hadith 1312