The scripture reference in this verse is to Isaiah 28.16 (see 9.33). In this particular verse Paul adds the word “everyone” to the Old Testament passage (Good News Translation whoever) in order to bring out the emphasis he intends.

Quoted with permission from Newman, Barclay M. and Nida, Eugene A. A Handbook on Paul’s Letter to the Romans. (UBS Handbook Series). New York: UBS, 1973. For this and other handbooks for translators see here .