verily! assafa and almarwah are of the symbols of allah. so it is not a sin on him who perform hajj or umrah of the house to perform the going between them . and whoever does good voluntarily then verily allah is allrecogniser allknower.
إن الصفا والمروة من شعائر الله فمن حج البيت أو اعتمر فلا جناح عليه أن يطوف بهما ومن تطوع خيرا فإن الله شاكر عليم