3 Nephi 29:7

yea, and wo unto him that shall say at that day, that there can be no miracle wrought by Jesus Christ, for to get gain; for he that doeth this, shall become like unto the son of perdition, for whom there was no mercy, according to the word of Christ.

Bad things will come to anyone who says at that time that Jesus Christ can’t do miracles anymore. They might say this to make money. Anyone who does this will become like the son of perdition. There was no mercy for him, according to the word of Christ.

Disaster for anyone who claims Jesus can’t do miracles anymore—especially those who say this to make money. Anyone who does this is heading toward the same fate as the son of destruction, for whom Christ had no mercy.