Genesis 6:21

“And take thou unto thee of all food that is eaten, and thou shalt gather it to thee; and it shall be for food for thee, and for them.”

KJV

Meaning

Preservation includes practical provision, not only the construction of the ark.

The food command is a concrete part of this preservation narrative, not a hidden formula about wealth, famine, or end-times preparation.

Faithful preparation in the story includes ordinary material provision for people and animals who depend on it.