Exodus 30:15

30:15 The rich are not to increase it, and the poor are not to pay less than the half shekel when giving the offering of the Lord, to make atonement for your lives.

Exodus 38:24

38:24 All the gold that was used for the work, in all the work of the sanctuary (namely, the gold of the wave offering) was twenty-nine talents and 730 shekels, according to the sanctuary shekel.