Ephesians 5:4

neither obscenity, nor foolish talking, nor indecent jesting, which are not becoming; but rather giving of thanks.

Ephesians 4:29

Let no foul language proceed out of your mouth, but whatever is good for edification, as the need may be, that it may benefit the hearers;

Romans 1:28

And as they did not choose to retain God in their knowledge, God gave them up to a reprobate mind, to do things which are shameful;

Matthew 12:34-37

How can ye, evil as ye are, speak good things? For out of the abundance of the heart the mouth speaketh.

Mark 7:22

thefts, murders, adulteries, covetousness, iniquities, deceit, wantonness, an evil eye, blasphemy, pride, foolishness.

John 6:23

(but there came other boats from Tiberias near the place where they ate the bread, when the Lord had given thanks;)

2 Corinthians 1:11

you also unitedly helping us by prayer, so that for this blessing bestowed on us by means of many, thanks may be given by many on your behalf.

2 Corinthians 9:15

Thanks be to God for his unspeakable gift.

Ephesians 1:16

do not cease to give thanks for you, making mention of you in my prayers;

Ephesians 5:19-20

speaking to one another in psalms, and hymns, and spiritual songs, singing and making melody in your heart to the Lord;

Philippians 4:6

Be anxious about nothing, but in everything by prayer and supplication with thanksgiving let your requests be made known to God;

Colossians 3:8

but now put ye away all these, anger, wrath, malice, evilspeaking, filthy language out of your mouth.

Colossians 3:15-17

and let the peace of Christ, to which ye were called in one body, rule in your hearts; and be ye thankful.

1 Thessalonians 3:9

For what thanks can we render to God for you, for all the joy wherewith we rejoice for your sakes before our God;

1 Thessalonians 5:18

in everything give thanks; for this is the will of God in Christ Jesus in regard to you.

Hebrews 13:15

Through him therefore let us offer up a sacrifice of praise to God continually, that is, the fruit of lips giving thanks to his name.

James 3:4-8

Behold also the ships, which, though they are so great, and driven by fierce winds, are yet turned about with a very small rudder, whithersoever the steersman chooseth.

2 Peter 2:7

and delivered righteous Lot, distressed by the lewd conduct of the lawless men;

2 Peter 2:18

For speaking great swelling words of vanity, they allure in the lusts of the flesh, by dissolute ways, such as were in some measure escaping from those who live in error;

Jude 1:10

But these rail at the things which they know not; but what things they understand naturally, as brute beasts, in these they corrupt themselves.

Jude 1:13

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

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 as they did not choose to retain God in their knowledge, God gave them up to a reprobate mind, to do things which are shameful;
Philemon 1:8
Wherefore, though I have much boldness in Christ to enjoin upon thee that which is befitting,

But

Ephesians 5:19
speaking to one another in psalms, and hymns, and spiritual songs, singing and making melody in your heart to the Lord;
Ephesians 1:16
do not cease to give thanks for you, making mention of you in my prayers;
John 6:23
(but there came other boats from Tiberias near the place where they ate the bread, when the Lord had given thanks;)
2 Corinthians 1:11
you also unitedly helping us by prayer, so that for this blessing bestowed on us by means of many, thanks may be given by many on your behalf.
2 Corinthians 9:15
Thanks be to God for his unspeakable gift.
Philippians 4:6
Be anxious about nothing, but in everything by prayer and supplication with thanksgiving let your requests be made known to God;
Colossians 3:15
and let the peace of Christ, to which ye were called in one body, rule in your hearts; and be ye thankful.
1 Thessalonians 3:9
For what thanks can we render to God for you, for all the joy wherewith we rejoice for your sakes before our God;
1 Thessalonians 5:18
in everything give thanks; for this is the will of God in Christ Jesus in regard to you.
Hebrews 13:15
Through him therefore let us offer up a sacrifice of praise to God continually, that is, the fruit of lips giving thanks to his name.