The scholars tend to see the trinitarian formula as being a later addition.
"The historical riddle is not solved by Matthew 28:19, since, according to a wide scholarly consensus, it is not an authentic saying of Jesus, not even an elaboration of a Jesus-saying on baptism" (The Anchor Bible Dictionary, Vol. 1, 1992, page 585).
"The historical riddle is not solved by Matthew 28:19, since, according to a wide scholarly consensus, it is not an authentic saying of Jesus, not even an elaboration of a Jesus-saying on baptism" (The Anchor Bible Dictionary, Vol. 1, 1992, page 585).
