The possible meaning of the number 420 is derived from the occurrence of certain original language words and from Scriptural history.
The English word "flesh" appears 420 times, in 369 verses, in the King James Bible. It appears the most in the book of Leviticus (59 times) followed by Genesis (28) then the book of Romans (26). Its first two uses in God's word are linked to the creation of Eve from Adam's rib.
And the Lord God caused a deep sleep to fall upon Adam, and he slept: and he took one of his ribs, and closed up the flesh instead thereof . . . And Adam said, This is now bone of my bones, and flesh of my flesh: she shall be called Woman, because she was taken out of Man (Genesis 2:21, 23, KJV).
Witches not a fan of this.
MadWitches make bad smelly sammiches.
https://www.biblestudy.org/bibleref/meaning-of-numbers-in-bible/420.html