ייִדישער מחשבֿה אויף שמות 30:7

Since many beasts were daily slaughtered in the holy place, the flesh cut in pieces and the entrails and the legs burnt and washed, the smell of the place would undoubtedly have been like the smell of slaughter-houses, if nothing had been done to counteract it. They were therefore commanded to burn incense there twice every day, in the morning and in the evening (Exod. 30:7, 8), in order to give the place and the garments of those who officiated there a pleasant odour. There is a well-known saying of our Sages, “In Jericho they could smell the incense” [burnt in the Temple]. This provision likewise tended to support the dignity of the Temple. If there had not been a good smell, let alone if there had been a stench, it would have produced in the minds of the people the reverse of respect; for our heart generally feels elevated in the presence of good odour, and is attracted by it, but it abhors and avoids bad smell.