According to Moses, every man had to give a small amount of silver, called a bekah, to help take care of God's special tent. This was done for all the men who were 20 years old and older, and there were a lot of them—over six hundred thousand!
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]. [every man: Heb. a poll]
Exodus 38:26 mentions a specific amount of silver collected from each person, which might conflict with other biblical records regarding population size or the amount of silver available at that time. This mathematical or logistical discrepancy can be seen as a historical inconsistency.