Leviticus 27:7

Overview - Leviticus 27
He that makes a singular vow must be the Lord's.
The estimation of the person;
of a beast given by vow;
14 of a house;
16 of a field, and the redemption thereof.
28 No devoted thing may be redeemed.
30 The tithe may not be changed.
Treasury of Scripture Knowledge

Leviticus 27:7  (King James Version)
And if it be from sixty years old and above; if it be a male, then thy estimation shall be fifteen shekels, and for the female ten shekels.

Psalms 90:10

The old man and the old woman, being almost past labour, were nearly of an equal value; the former being estimated at 15 shekels, and the latter at 10.