A man asked Abdullah ibn Umar between as-Safa and al-Marwah: AbdurRahman, I see you walking while the people are running (between as-Safa and al-Marwah)? He replied: If I walk, I saw the Messenger of Allah ﷺ running. I am too old. (Using translation from Abū Dāʾūd 1904)
إِنْ أَسْعَ فَقَدْ رَأَيْتُ رَسُولَ اللهِ ﷺ يَسْعَى وَإِنْ أَمْشِ فَقَدْ رَأَيْتُ رَسُولَ اللهِ ﷺ يَمْشِي وَأَنَا شَيْخٌ كَبِيرٌ