Philippians 4:11
ESV - 11 Not that I am speaking of being in need, for I have learned in whatever situation I am to be content.
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Paul is "persuaded" and convinced that GOD will and has supplied all his needs. (see 2Timothy 1:12). Also, the Bible says in Hebrews 13:5 to "be content with what you have. . . GOD will never leave or forsake you" The promises of GOD (to a believer) are all that are needed not to be "in need".