Revelation 13:5

And the beast was given a mouth (the power of speech), uttering great things and arrogant and blasphemous words, and he was given freedom and authority to act and to do as he pleased for forty-two months (three and a half years).

Daniel 7:8

While I was considering the horns, behold, there came up among them another horn, a little one, and three of the first horns were pulled up by the roots before it; and behold, in this horn were eyes like the eyes of a man and a mouth boasting of great things.

Daniel 7:11

Then I kept looking because of the sound of the great and boastful words which the horn was speaking. I kept looking until the beast was slain, and its body destroyed and given to be burned with fire.

Daniel 11:36

“Then the king (the Antichrist) will do exactly as he pleases; he will exalt himself and magnify himself above every god and will speak astounding and disgusting things against the God of gods and he will prosper until the indignation is finished, for that which is determined [by God] will be done.

Daniel 7:25

He will speak words against the Most High [God] and wear down the saints of the Most High, and he will intend to change the times and the law; and they will be given into his hand for a time, [two] times, and half a time [three and one-half years].

Revelation 12:6

Then the woman fled into the wilderness where she had a place prepared by God, so that she would be nourished there for a thousand two hundred and sixty days (forty-two months; three and one-half years).

Daniel 7:20

and the meaning of the ten horns (kings) that were on its head and the other horn which came up later, and before which three of the horns fell, specifically, that horn which had eyes and a mouth that boasted great things and which looked larger than the others.

Revelation 11:2-3

But leave out the court [of the Gentiles] which is outside the temple and do not measure it, because it has been given to the Gentiles (the nations); and they will trample the holy city for forty-two months (three and one-half years).

Revelation 12:14

But the two wings of the great eagle were given to the woman, so that she could fly into the wilderness to her place, where she was nourished for a time and times and half a time (three and one-half years), away from the presence of the serpent (Satan).

2 Thessalonians 2:4

who opposes and exalts himself [so proudly and so insolently] above every so-called god or object of worship, so that he [actually enters and] takes his seat in the temple of God, publicly proclaiming that he himself is God.

Revelation 11:7

When they have finished their testimony and given their evidence, the beast that comes up out of the abyss (bottomless pit) will wage war with them, and overcome them and kill them.

Revelation 13:7

He was also permitted to wage war against the saints (God’s people) and to overcome them, and authority and power over every tribe and people and language and nation.

Treasury of Scripture Knowledge

Summary

And there was given unto him a mouth speaking great things and blasphemies; and power was given unto him to continue forty and two months.

Bible References

A mouth

Daniel 7:8
While I was considering the horns, behold, there came up among them another horn, a little one, and three of the first horns were pulled up by the roots before it; and behold, in this horn were eyes like the eyes of a man and a mouth boasting of great things.
Daniel 11:36
“Then the king (the Antichrist) will do exactly as he pleases; he will exalt himself and magnify himself above every god and will speak astounding and disgusting things against the God of gods and he will prosper until the indignation is finished, for that which is determined [by God] will be done.

And power

Revelation 11:2
But leave out the court [of the Gentiles] which is outside the temple and do not measure it, because it has been given to the Gentiles (the nations); and they will trample the holy city for forty-two months (three and one-half years).
Revelation 12:6
Then the woman fled into the wilderness where she had a place prepared by God, so that she would be nourished there for a thousand two hundred and sixty days (forty-two months; three and one-half years).

To continue

Revelation 13:7
He was also permitted to wage war against the saints (God’s people) and to overcome them, and authority and power over every tribe and people and language and nation.
Revelation 11:7
When they have finished their testimony and given their evidence, the beast that comes up out of the abyss (bottomless pit) will wage war with them, and overcome them and kill them.

General references

Proverbs 17:4

An evildoer listens closely to wicked lips;
And a liar pays attention to a destructive and malicious tongue.
Isaiah 36:14
This is what the king says, ‘Do not let Hezekiah deceive you, for he will not be able to rescue you;
Matthew 15:18
But whatever [word] comes out of the mouth comes from the heart, and this is what defiles and dishonors the man.