Treasury of Scripture Knowledge
Summary
                            Now the Levites were numbered from the age of thirty years and upward: and their number by their polls, man by man, was thirty and eight thousand.                        
                    The levites
Thirty and eight
General references
Bible References
The levites
                                        Numbers 4:2                                        
                                                            
                        “Among the Levites, take a census of the Kohathites by their clans and their ancestral houses,  
                                    Thirty and eight
                                        Numbers 4:48                                        
                                                            
                        Their registered men numbered 8,580. 
                                    General references
                                        Numbers 4:35                                        
                                                            
                        men from 30 years old to 50 years old, everyone who was qualified for work at the tent of meeting.