“But Jesus said.
‘Do not stop him!
No one who does
A deed of power
In my name
Will be able
Soon afterward
To speak evil
Of me.’”
ὁ δὲ Ἰησοῦς εἶπεν Μὴ κωλύετε αὐτόν· οὐδεὶς γάρ ἐστιν ὃς ποιήσει δύναμιν ἐπὶ τῷ ὀνόματί μου καὶ δυνήσεται ταχὺ κακολογῆσαί με·
There is summary statement similar to this in Luke, chapter 9:49, but not in Matthew. Mark indicated that Jesus told them (ὁ δὲ Ἰησοῦς εἶπεν) not to stop or prevent this exorcist (Μὴ κωλύετε αὐτόν) who used his name. Jesus said that no one who did a deed of exorcistic power (οὐδεὶς γάρ ἐστιν ὃς ποιήσει δύναμιν) in his name (ἐπὶ τῷ ὀνόματί μου) would be able to easily or readily speak evil of him (καὶ δυνήσεται ταχὺ κακολογῆσαί με) after what they had done.