Colossians 4:5

Be prudent in your conduct to those, who are not christians: and make the best of of every opportunity.

Hebrews 2:1

Therefore we ought to give the greater attention to the things we have heard, for fear we should abandon the gospel.

James 1:26

If a person of an ungovernable tongue pretends to religion, he abuses himself: for his religion is meer illusion.

James 3:2-8

for we are all liable to frequent mistakes. he that does not give too great a loose to his tongue, is an accomplish'd person and fit to moderate the whole church.

Treasury of Scripture Knowledge

Summary

{To the chief Musician, even to Jeduthun, A Psalm of David.} I said, I will take heed to my ways, that I sin not with my tongue: I will keep my mouth with a bridle, while the wicked is before me.

I said

My mouth, etc

General references

Bible References

I said

Hebrews 2:1
Therefore we ought to give the greater attention to the things we have heard, for fear we should abandon the gospel.

My mouth, etc

James 1:26
If a person of an ungovernable tongue pretends to religion, he abuses himself: for his religion is meer illusion.
James 3:2
for we are all liable to frequent mistakes. he that does not give too great a loose to his tongue, is an accomplish'd person and fit to moderate the whole church.

While

Colossians 4:5
Be prudent in your conduct to those, who are not christians: and make the best of of every opportunity.

General references

James 3:3
you see how manageable horses are made by the application of a bit, which makes them take what motion we please.