John Gill Commentary Ezra 8:34

"the whole by number and by weight: and all the weight was written at that time." — Ezra 8:34 (ASV)

By number and by weight of everyone
They were delivered in by tale and weight, which exactly agreed to the number and weight in which they received them:

and all the weight was written at that time ;
an account was taken in writing, and laid up, that it might not only be known hereafter what freewill offerings had been made in Babylon, but that it might be a voucher for the fidelity and integrity of those that brought them, should it ever be called in question.