INTRODUCTION TO EXODUS 30 This chapter treats of the altar of incense, its form and use, Exo 30:1 of the ransom of the Israelites, with the half shekel when numbered, Exo 30:11 of the laver for the priests to wash their hands and feet at before service, Exo 30:17 of the anointing oil, the ingredients of it, and what was to be done with it, Exo 30:22, and of the perfume, the composition and use of it, Exo 30:34.