The language of Mormon 9:22–24 is nearly identical to that of Mark 16:15–18, where the Savior gives a very similar commission to his Old World disciples. Yet some question whether the Savior really gave such a commission, in either the Old World or the New, since some of the earliest copies of the Gospel of Mark are missing the text in Mark 16:9–20. This textual absence, combined with other complicated textual and stylistic considerations, has led scholars to question whether Mark originally included verses 9–20, commonly referred to as the “long ending” of Mark.
But before jumping to conclusions about the authenticity of either Mark 16:15–18, or Mormon 9:22–24, there are several considerations to keep in mind.