Exodus 38:26
A bekah for every man, that is, half a shekel, after the shekel of the sanctuary, for every one that went to be numbered, from twenty years old and upward, for six hundred thousand and three thousand and five hundred and fifty men.
Cross-reference
Exodus 12:37 mentions about 600,000 men on foot leaving Egypt, closely matching the 603,550 men counted here.
Exodus 30:13 gives the law of the half-shekel census offering, which is exactly what is being collected in this verse.
Exodus 30:15 emphasizes that rich and poor alike must give exactly half a shekel—the same principle applied here.
Exodus 30:16 explains the purpose of the half-shekel: atonement money for the service of the tent, which this collection funds.
Exodus 30:12 commands the census and the ransom offering to prevent plague—the rationale behind this collection.
Numbers 1:46 records the same total number of fighting men (603,550) from another census—confirming the count.
Numbers 1:2 commands a census of all males twenty years and older, the same group counted here.
Numbers 2:32 repeats the exact total of 603,550 men from the wilderness census, matching this verse's count.
Numbers 11:21 refers to the 600,000 foot soldiers among Israel, echoing the same large number from the census.
Numbers 26:2 records a later census of Israel, using the same counting terminology as the census here that provided the atonement silver.
Matthew 17:24 refers to the same half-shekel temple tax that was instituted here for the census.