Ephesians 5:4

so too with vulgarity and buffoonery and foolish jesting. Such words become you not, but rather thanksgiving.

Ephesians 4:29

From your lips let no evil words come forth, but such as occasion warrants, such as are good for upbuilding and give a blessing to the hearers.

Romans 1:28

And just as they refused to continue to retain God in their knowledge, so did God cast them out to an outcast mind, to do those things which were indecent.

Matthew 12:34-37

"You generation of vipers! How can you speak good, when you are evil? For the mouth speaks what the heart is full of. "When the time of fruit drew near, he sent his slaves to the vine-dressers seized to get his fruit.

John 6:23

So, on the following day, when boats came from Tiberias near the place were they had eaten bread, after the Lord had given thanks, they got into the boats themselves,

2 Corinthians 1:11

while all of you also are helping me by your prayers; so that from many lips thanksgiving may rise on my behalf for the blessings vouchsafed to me through the intercessions of many.

2 Corinthians 9:15

THANKS BE TO GOD FOR HIS UNSPEAKABLE GIFT!

Ephesians 1:16

do not cease to praise God for you, whenever I mention you in my prayers.

Ephesians 5:19-20

when you talk together; with psalms and hymns and spiritual songs, singing and with all your hearts making music unto the Lord;

Philippians 4:6

Do not worry about anything; but in everything by prayer and supplication, with thanksgiving, let your requests be made known to God;

Colossians 3:8

But now you also must renounce them all. Anger, passion, and ill-will must be put away; slander, too, and foul talk, so that they may never soil your lips.

Colossians 3:15-17

Let the peace of Christ, to which also you were called in one body, rule in your hearts, and show yourselves thankful.

1 Thessalonians 3:9

For what thanksgiving can I render again to God in your behalf, in return for all the joy which you cause me in the presence of my God?

1 Thessalonians 5:18

Give thanks in every circumstance, for this is the will of God for you in Christ Jesus.

Hebrews 13:15

In his name, then, let us continually offer up a sacrifice of praise to God, that is the fruit of lips that confess his name.

James 3:4-8

Look at the ships too, though they are so large, even when driven by fierce winds they are turned by a very small rudder, wherever the impulse of the helmsman wills.

2 Peter 2:7

and he delivered righteous Lot who was worn out by the lascivious life of the wicked

2 Peter 2:18

For speaking great swelling words of vanity, they entangle, by their lasciviousness, in the lusts of the flesh, those who are just about to escape from the men that live in misconduct.

Jude 1:10

Yet these men blaspheme about matters of which they know nothing, while they use such things as they do understand by instinct (like the animals who have no reason) for their own destruction.

Jude 1:13

wild waves of the sea, foaming out their own shame; wandering stars, for whom is reserved the blackness of darkness forever.

Treasury of Scripture Knowledge

Summary

Neither filthiness, nor foolish talking, nor jesting, which are not convenient: but rather giving of thanks.

Bible References

Convenient

Romans 1:28
And just as they refused to continue to retain God in their knowledge, so did God cast them out to an outcast mind, to do those things which were indecent.
Philemon 1:8
And so, although I might be bold in Christ to dictate to you what is fitting,

But

Ephesians 5:19
when you talk together; with psalms and hymns and spiritual songs, singing and with all your hearts making music unto the Lord;
Ephesians 1:16
do not cease to praise God for you, whenever I mention you in my prayers.
John 6:23
So, on the following day, when boats came from Tiberias near the place were they had eaten bread, after the Lord had given thanks, they got into the boats themselves,
2 Corinthians 1:11
while all of you also are helping me by your prayers; so that from many lips thanksgiving may rise on my behalf for the blessings vouchsafed to me through the intercessions of many.
2 Corinthians 9:15
THANKS BE TO GOD FOR HIS UNSPEAKABLE GIFT!
Philippians 4:6
Do not worry about anything; but in everything by prayer and supplication, with thanksgiving, let your requests be made known to God;
Colossians 3:15
Let the peace of Christ, to which also you were called in one body, rule in your hearts, and show yourselves thankful.
1 Thessalonians 3:9
For what thanksgiving can I render again to God in your behalf, in return for all the joy which you cause me in the presence of my God?
1 Thessalonians 5:18
Give thanks in every circumstance, for this is the will of God for you in Christ Jesus.
Hebrews 13:15
In his name, then, let us continually offer up a sacrifice of praise to God, that is the fruit of lips that confess his name.