Exodus 30:15-17 Common English Bible (CEB)
15 When you bring this gift offering to the Lord to pay compensation for your lives, the rich shouldn’t give more and the poor shouldn’t give less than the half shekel. 16 Take the compensation money from the Israelites and use it to support the service of the meeting tent. It will serve for the Israelites as a reminder in the Lord’s presence of the compensation paid for your lives.
Instructions for the washbasin
17 The Lord spoke to Moses: