Ephesians 5:4

nor indecorum and foolish talking, or jesting, things not becoming, but rather giving of thanks.

Ephesians 4:29

Let no evil word proceed out of your mouth, but that which is good for useful edification, that it may afford benefit to those that hear.

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 not proper,

Matthew 12:34-37

Offspring of vipers, how can you, being evil, speak good things? For out of the abundance of the heart the mouth speaks.

Mark 7:22

thefts, murders, adulteries, covetousness, malice, deceit, lewdness, an evil eye, blasphemy, pride, foolishness.

2 Corinthians 1:11

you also striving together for us in prayer, that thanks may be rendered for us by many persons for the gift bestowed on us by many.

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 yourselves in psalms and hymns and spiritual songs, singing and making music in your hearts to the Lord,

Philippians 4:6

Be anxious for nothing, but with all prayer and supplication with thanksgiving let your requests be made known to God.

Colossians 3:8

but now do you put away also all these, anger, wrath, malice, blasphemy, vile conversation out of your mouth;

Colossians 3:15-17

And let the peace of Christ rule in your hearts, for which you have been called in one body; and be thankful.

1 Thessalonians 3:9

For what thanksgiving can we render to God for you for all the joy with which we rejoice on your account before our God,

1 Thessalonians 5:18

give thanks on every occasion; for this is the will of God in Christ Jesus to us.

Hebrews 13:15

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

James 3:4-8

behold also the ships, though of so great size and driven by powerful winds, are directed by a very small helm wherever the will of the pilot chooses;

2 Peter 2:7

and delivered righteous Lot, vexed by the lewd conduct of the wicked;??8 for that righteous man living among them vexed his righteous soul from day to day by seeing and hearing their wicked deeds;??9 the Lord knows how to deliver the pious from trial, and to keep the wicked to the day of judgment to be punished,

2 Peter 2:18

For speaking extravagant words of vanity, they entice with carnal desires of lewdness those scarcely escaped from them, those living in error,

Jude 1:10

But these blaspheme what they do not understand, and what they know naturally, as brute beasts, in these things they corrupt themselves.

Jude 1:13

wild waves of the sea foaming with their own shame, wandering stars to which 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 not proper,
Philemon 1:8
Wherefore, having great boldness to command you what is fit,

But

Ephesians 5:19
speaking to yourselves in psalms and hymns and spiritual songs, singing and making music in your hearts to the Lord,
Ephesians 1:16
do not cease to give thanks for you, making mention of you in my prayers,
2 Corinthians 1:11
you also striving together for us in prayer, that thanks may be rendered for us by many persons for the gift bestowed on us by many.
2 Corinthians 9:15
Thanks be to God for his unspeakable gift.
Philippians 4:6
Be anxious for nothing, but with all prayer and supplication with thanksgiving let your requests be made known to God.
Colossians 3:15
And let the peace of Christ rule in your hearts, for which you have been called in one body; and be thankful.
1 Thessalonians 3:9
For what thanksgiving can we render to God for you for all the joy with which we rejoice on your account before our God,
1 Thessalonians 5:18
give thanks on every occasion; for this is the will of God in Christ Jesus to us.
Hebrews 13:15
Through him, therefore, let us offer the sacrifice of praise continually to God, that is, the fruit of lips confessing his name.