The strip of ground between Mount Safa and Mount Marwah is referred to as the Mas’aa. It is where Hajra (عليها السلام) rushed seven times to see if she could spot any water or anyone from whom she could get some in order to give to her infant Ismail (عليه السلام). This action is copied by all pilgrims performing Hajj or Umrah and is known as Sa’ee.
Featured image: https://atlasislamica.com/masaa/