וְכָל־עֶרְכְּךָ֔ יִהְיֶ֖ה בְּשֶׁ֣קֶל הַקֹּ֑דֶשׁ עֶשְׂרִ֥ים גֵּרָ֖ה יִהְיֶ֥ה הַשָּֽׁקֶל׃ (ס)
And all thy valuations shall be according to the shekel of the sanctuary; twenty gerahs shall be the shekel.
Read kabbalistic (mystical) interpretation of Leviticus 27:25: and classical mystical sources.