Leviticus 27:8

But if he be poorer than thy estimation, then he shall present himself before the priest, and the priest shall value him; according to his ability that vowed shall the priest value him.

Cross-reference

Leviticus 14:21 provides the same principle for a poor person's offering, adjusting the cost based on ability to pay.

Leviticus 5:7 also allows a poorer person to bring a lesser sin offering, paralleling the priest's adjustment for poverty here.

Leviticus 12:8 provides a similar poverty provision for purification offerings, matching the principle of accommodating the poor.

Leviticus 14:22 continues the poor person's offering, specifying affordable birds as a substitute, similar to the valuation here.

2 Corinthians 8:12 echoes this principle: giving is acceptable according to what one has, not beyond ability.

Deuteronomy 16:17 commands giving according to ability, the same principle applied to vows here.