In Numbers 4:3, God specifies the age range for Kohathite service — here that command is applied in the census.

Numbers 4:23 applies the same 30-50 age requirement to the Merarites, showing consistent census criteria for all Levite families.

Numbers 4:30 applies the same age range to the Gershonites, reinforcing the uniform standard for Levitical service.

Numbers 4:39 repeats the same age requirement for the Merarites, continuing the census pattern for that family.

Numbers 4:43 repeats the same age requirement for the Merarites, completing the census of that family.

Numbers 4:47 summarizes all Levites counted from 30 to 50, confirming the total and the age range.

Numbers 3:28 gives total Kohathite males from one month old (8,600), providing the larger pool from which the 30-50 age group here is drawn.

Numbers 8:24-26 shifts the starting age to 25 and adds retirement at 50, modifying the service regulations found here.

1 Chronicles 23:3 echoes the 30-and-upward age for Levites during David's census, directly paralleling Numbers' requirement.

Luke 3:23 notes Jesus began ministry at about thirty, mirroring the Levitical age threshold here, typologically linking Christ to priestly service.

1 Chronicles 23:24 later changes the age to 20 years and upward, a contrast to the 30-year minimum here.

1 Chronicles 23:26 states Levites no longer carry the tabernacle, contrasting with their carrying duties in Numbers 4.

1 Chronicles 23:27 explains the age change to 20 by David's last words, contrasting with the earlier 30-year requirement.

1 Chronicles 28:13 details divisions for temple service, echoing the organization of Levitical service described here. Both concern structured worship roles.