Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Ansari Companions disliked performing Sa’i between Safa and Marwah until this verse was revealed: « إِنَّالصَّفَاوَالْمَرْوَةَمِنشَعَائِرِاللَّهِ »[ سورة البقرة : 158 ] "Indeed, Safa and Marwah are among the symbols of Allah." In the narration of Janab Salm bin Junadah, there is this addition: then they began to perform Sa’i.
Hadith Referenceصحيح ابن خزيمه / جماع أبواب ذكر أفعال اختلف الناس فى إباحته للمحرم، نصت سنة النبى صلى الله عليه وسلم أو دلت على إباحتها / 2768