Mark 9:39

But Jesus said, "Do not prevent him, because there is no one who does a miracle in my name and will be able soon afterward to speak evil of me.

Matthew 7:22-23

On that day many will say to me, 'Lord, Lord, did we not prophesy in your name, and expel demons in your name, and perform many miracles in your name?'

Matthew 13:28-29

And he said to them, 'An enemy has done this!' So the slaves said to him, 'Then do you want us to go [and] gather them?'

Mark 10:13-14

And they were bringing young children to him so that he could touch them, but the disciples rebuked them.

Acts 19:13-16

But some itinerant Jewish exorcists also attempted to pronounce the name of the Lord Jesus over those who had evil spirits, saying, "I adjure you by Jesus whom Paul preaches!"

1 Corinthians 9:27

But I discipline my body and subjugate [it], lest somehow [after] preaching to others, myself should become disqualified.

1 Corinthians 12:3

Therefore I make known to you that no one speaking by the Spirit of God says, "Jesus [is] accursed," and no one is able to say "Jesus [is] Lord" except by the Holy Spirit.

1 Corinthians 13:1-2

If I speak with the tongues of men and of angels, but do not have love, I have become a ringing brass gong or a clashing cymbal.

Philippians 1:18

{What is the result?} Only that in every way, whether in pretense or in truth, Christ is proclaimed, and in this I rejoice. But also I will rejoice,

Treasury of Scripture Knowledge

Summary

But Jesus said, Forbid him not: for there is no man which shall do a miracle in my name, that can lightly speak evil of me.

General references

Bible References

Forbid

Mark 10:13
And they were bringing young children to him so that he could touch them, but the disciples rebuked them.
Matthew 13:28
And he said to them, 'An enemy has done this!' So the slaves said to him, 'Then do you want us to go [and] gather them?'
Philippians 1:18
{What is the result?} Only that in every way, whether in pretense or in truth, Christ is proclaimed, and in this I rejoice. But also I will rejoice,

There

Matthew 7:22
On that day many will say to me, 'Lord, Lord, did we not prophesy in your name, and expel demons in your name, and perform many miracles in your name?'
Acts 19:13
But some itinerant Jewish exorcists also attempted to pronounce the name of the Lord Jesus over those who had evil spirits, saying, "I adjure you by Jesus whom Paul preaches!"
1 Corinthians 9:27
But I discipline my body and subjugate [it], lest somehow [after] preaching to others, myself should become disqualified.
1 Corinthians 13:1
If I speak with the tongues of men and of angels, but do not have love, I have become a ringing brass gong or a clashing cymbal.

Lightly

1 Corinthians 12:3
Therefore I make known to you that no one speaking by the Spirit of God says, "Jesus [is] accursed," and no one is able to say "Jesus [is] Lord" except by the Holy Spirit.

General references

2 Corinthians 13:8
For we are not able [to do] anything against the truth, but rather [only] for the truth.