I shall tell you the reward of Hajj (an annual Islamic pilgrimage to Mecca). As soon as you enter the Sacred Mosque, Do nothing, just sit down, neither pray nor do Tawaf, look at The House of Kaba. With every look, hundreds of thousands of good deeds are written in his action letter and one hundred thousand sins will be erased. And only Allah Almighty knows the rewards of Mashar, Safa, Marwa and throwing pebbles.
source : erfan.ir