Musar for Sanhedrin 134:9

מכשפה לא תחיה. Do not allow a witch to survive!" (22,17). Rabbi Yochanan in Sanhedrin 67, relates the term מכשפה to the fact that witches deny the existence and function of Divine messengers, i.e. פמליא של מעלה. The Chinuch describes the substance of such witches (whether male or female) in the following words: "At the time of creation, G–d assigned certain activities to everything that has been created; such activities are all meant to benefit the universe. This is the meaning of Genesis 1,12, that each variety of herb came into being למינהו, in its individual kind, with its individual function. Each had a spiritual counterpart assigned to it in the "higher" world. This is what Bereshit Rabbah 10,7 means when it says that every herb has its own מזל in Heaven. This מזל instructs the herb to grow.