ENOfficial
It was narrated that Jabir said: "When the Messenger of Allah (ﷺ) reached level ground at the bottom of the valley, he would hasten until he came out of it."
Source: sunnah.com
Other translations
Arabic
أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، عَنْ سُفْيَانَ، عَنْ جَعْفَرٍ، عَنْ أَبِيهِ، عَنْ جَابِرٍ، قَالَ لَمَّا تَصَوَّبَتْ قَدَمَا رَسُولِ اللَّهِ صلى الله عليه وسلم فِي بَطْنِ الْوَادِي رَمَلَ حَتَّى خَرَجَ مِنْهُ .
sunnah.com