Man shall not live by bread alone but by every word of God matt 3:4

By Saying "Man does live by bread alone, but, by every Word from the Mouth Of God."

White bread contains less nutrients than whole wheat bread. Mold needs nutirents like phosphorus and sulphur which is found only in very low levels in white bread. As the quote says "man cannot live on [white] bread alone" nor can mold or not very well.

Satan told Jesus that he should turn the stone into bread.(Luke 4:3-4)

Yes, of course.

The phrase to which Jesus refers when he says "it is written: 'man should not live by bread alone' " comes from Deuteronomy 8:3. And here iit clearly means, in the orignal Hebrew, 'humanity' or 'men and women'.