There is no blame for a pilgrim of the House or a visitor in walking between the Mount Safa and the Mount Marwa. (They are historical relics of Allah since Abraham and Ishmael worked there to build the Ka'bah. Rites and rituals in themselves are not the end. They must be treated only as devotional means to a higher goal (22:28)). Therefore, do every good deed possible that will benefit the community. Allah is Appreciative and fully rewards such people. He is all Knowing.