Vayikra 5:15

If a nefesh commit a ma'al (trespass), and sin through ignorance (unintentionally), in the holy things of HASHEM; then he shall bring for his asham unto HASHEM a ram tamim out of the flocks, with thy estimation by shekels of kesef, after the Shekel HaKodesh (the Shekel of the Sanctuary), for an asham (trespass or guilt offering).