The Holy Spirit Sending Men Forth to Definite Lines of Work.
We read in Acts xiii. 2-4, "As they ministered to the Lord, and fasted, the Holy Ghost said, Separate Me Barnabas and Saul for the work whereunto I have called them. And when they had fasted and prayed, and laid their hands on them, they sent them away. So they, being sent forth by the Holy Ghost, departed into Seleucia; and from thence they sailed to Cyprus." It is evident from this passage that the Holy Spirit calls men into definite lines of work and sends them forth into the work. He not …
R. A. Torrey—The Person and Work of The Holy Spirit

Of Preparation.
That a Christian ought necessarily to prepare himself before he presume to be a partaker of the holy communion, may evidently appear by five reasons:-- First, Because it is God's commandment; for if he commanded, under the pain of death, that none uncircumcised should eat the paschal lamb (Exod. xii. 48), nor any circumcised under four days preparation, how much greater preparation does he require of him that comes to receive the sacrament of his body and blood? which, as it succeeds, so doth it …
Lewis Bayly—The Practice of Piety

Numbers
Like the last part of Exodus, and the whole of Leviticus, the first part of Numbers, i.-x. 28--so called,[1] rather inappropriately, from the census in i., iii., (iv.), xxvi.--is unmistakably priestly in its interests and language. Beginning with a census of the men of war (i.) and the order of the camp (ii.), it devotes specific attention to the Levites, their numbers and duties (iii., iv.). Then follow laws for the exclusion of the unclean, v. 1-4, for determining the manner and amount of restitution …
John Edgar McFadyen—Introduction to the Old Testament