For those of you who aren't familiar with 2 Esdras: It is considered part of the canon by the Ethiopic and Russian Orthodox Churches. The church fathers quote from it, including Jerome, who called it 4 Ezra. It doesn't survive in Greek, but does survive in Latin, Syriac, Arabic, Ethiopic, Georgian, and Armenian (there's a nice short summary here).
According to most, the first two chapters are probably a later Christian interpolation. Thus, the status of the quotation above is probably a Christian injunction, and it certainly is a view that is heavily endorsed in the New Testament.
Let those who have ears, here!