Mishkat al-Masabih 10 The Rites of Pilgrimage كتاب المناسك 59

وَعَنْهُ قَالَ: رَمَلَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ الْحَجَرِ ثَلَاثًا وَمَشَى أَرْبَعًا وَكَانَ يَسْعَى بِبَطْنِ الْمَسِيلِ إِذَا طَافَ بَيْنَ الصَّفَا وَالْمَرْوَةِ. رَوَاهُ مُسلم

He said that God’s messenger ran three circuits beginning at the stone and walked four, and he ran in the bottom of the channel when he went between as-Safa and al-Marwa. Muslim transmitted it.