Matthew 12:36

And I say to you, a person will [have to] give an account [to God] on the day of judgment for every careless word he had spoken [while on earth].

Romans 2:16

This will be done on the day when God judges the secrets of men's [hearts] through Christ Jesus, according to [the teaching of] my Gospel.

Ephesians 6:4-6

And you fathers [Note: This word probably includes both parents], do not stir up your children to become angry, but bring them up in the training and instruction of the Lord.

Jude 1:14-15

And it was also prophesied about [these] people by Enoch, the seventh [descendant] of Adam [Gen. 5:18-24], who said, "Look, the Lord came with thousands upon thousands [Note: The Greek uses the plural form of "myriad," which means 10,000] of His holy ones [i.e., angels],

Revelation 20:12

And I saw dead people, the most important and the least significant ones, standing in front of the throne, and books were opened. Then another book was opened, which is the book of life [Note: This refers to a record of those to whom God has granted never ending life]. And these dead people [i.e., who have now been resurrected] were judged according to their deeds, based on what was recorded in the books.

Treasury of Scripture Knowledge

Summary

But I say unto you, That every idle word that men shall speak, they shall give account thereof in the day of judgment.

General references

Bible References

Every

Romans 2:16
This will be done on the day when God judges the secrets of men's [hearts] through Christ Jesus, according to [the teaching of] my Gospel.
Ephesians 6:4
And you fathers [Note: This word probably includes both parents], do not stir up your children to become angry, but bring them up in the training and instruction of the Lord.
Jude 1:14
And it was also prophesied about [these] people by Enoch, the seventh [descendant] of Adam [Gen. 5:18-24], who said, "Look, the Lord came with thousands upon thousands [Note: The Greek uses the plural form of "myriad," which means 10,000] of His holy ones [i.e., angels],
Revelation 20:12
And I saw dead people, the most important and the least significant ones, standing in front of the throne, and books were opened. Then another book was opened, which is the book of life [Note: This refers to a record of those to whom God has granted never ending life]. And these dead people [i.e., who have now been resurrected] were judged according to their deeds, based on what was recorded in the books.

General references

Mark 7:20
And He said, "Whatever proceeds out of a man's life is what [spiritually] corrupts him.
Romans 14:12
So then, every one of us [i.e., including Christians] will have to give an account of himself to God.