while she was on a journey along with the Messenger of Allah ﷺ: I had a race with him (the Prophet) and I outstripped him on my feet. When I became fleshy, (again) I had a race with him (the Prophet) and he outstripped me. He said: This is for that outstripping.  

أَنَّهَا كَانَتْ مَعَ النَّبِيِّ ﷺ فِي سَفَرٍ قَالَتْ فَسَابَقْتُهُ فَسَبَقْتُهُ عَلَى رِجْلَىَّ فَلَمَّا حَمَلْتُ اللَّحْمَ سَابَقْتُهُ فَسَبَقَنِي فَقَالَ هَذِهِ بِتِلْكَ السَّبْقَةِ