´Ibn Abbas narrated:` "The Messenger of Allah only performed the Sa'i of the House and of As-Safa and Al-Marwah to show his strength to the idolaters."
Hadith Referenceسنن ترمذي / كتاب الحج عن رسول الله صلى الله عليه وسلم / 863
´Kathir bin Jumhan said:` "I saw Ibn Umar walking at the place of Sa'i so I said to him: 'Do you walk at the place of Sa'i between As-Safa and Al-Marwah?' He said: 'If I performed Sa'i, then it is because I saw the Messenger of Allah performing Sa'i there, and if I walked, then it is because I have seen the Messenger of Allah walking. And I am an old man.'"
Hadith Referenceسنن ترمذي / كتاب الحج عن رسول الله صلى الله عليه وسلم / 864