“You also gave Your good Spirit to instruct them, and did not withhold Your manna from their mouth, and gave them water for their thirst. Forty years You sustained them in the wilderness; they lacked nothing; their clothes did not wear out and their feet did not swell.” (Nehemiah 9:20-21)
Yahweh (the real God) sustained the Israelites 40 years with food, water, and clothing! Yes, Proverbs speaks of being prepared. Joseph did for the years of famine and Noah, for the flood, so we should also prepare for what Jesus says is to occur before His return. Yet, when our supplies have diminished, continue to pray and trust in Him.