thirty. This thirty pertains to their numbering, The age twenty-five pertains to their service. So that there was a probationary live years. Changed (by Divine direction given to David) in 1Ch_23:23, 1Ch_23:24, 1Ch_23:27 to twenty. Compare 2Ch_31:17.
all that enter into the host. This expression occurs five times in this chapter, verses: Num_4:3, Num_4:30, Num_4:35, Num_3:39, Num_3:43.
tabernacle of the congregation = "tent of meeting". Hebrew. 'ohel. See App-40.