All we need, both physically and spiritually, can be found in Jesus. This quote was taken from Deuteronomy 8:3, and was used when Jesus was speaking to Satan while being tempted.

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But He answered and said, “It is written, ‘ man shall not live on bread alone , but on every word that proceeds out of the mouth of God .'”
Matthew 4:4 NASB
https://bible.com/bible/100/mat.4.4.NASB