"I saw Ibn Umar walking between As-Safa and Al-Marwah. He said: 'I am walking because I saw the Messenger of Allah Walking, and I hasten because I saw the Messenger of Allah hasten.'"  

إِنْ أَمْشِي فَقَدْ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَمْشِي وَإِنْ أَسْعَى فَقَدْ رَأَيْتُ رَسُولَ اللَّهِ ﷺ يَسْعَى  

"I saw Ibn Umar and he mentioned something similar, except he said: "and I am an old man."  

أَنَّهُ قَالَ وَأَنَا شَيْخٌ كَبِيرٌ