New Revised Standard Version
You say, ‘See, I have defeated Edom,’ and your heart has lifted you up in boastfulness. Now stay at home; why should you provoke trouble so that you fall, you and Judah with you?”

Contemporary English Version
Amaziah, you think you're so powerful because you defeated Edom. But stay at home and do your celebrating. If you cause any trouble, both you and your kingdom of Judah will be destroyed.

New American Bible
You are thinking, ‘See, I have struck down Edom!’ Your heart is lifted up, And glories in it. Stay home! Why bring misfortune and failure on yourself and on Judah with you?”

Douay-Rheims Bible
Thou hast said: I have overthrown Edom, and therefore thy heart is lifted up with pride: stay at home, why dost thou provoke evil against thee, that both thou shouldst fall and Juda with thee.

Thou hast said: I have overthrown Edom, and therefore thy heart is lifted up with pride: stay at home, why dost thou provoke evil against thee, that both thou shouldst fall and Juda with thee.

heart

2 Chronicles 26:16 But when he was made strong, his heart was lifted up to his destruction, and he neglected the Lord his God: and going into the temple of the Lord, he had a mind to burn incense upon the altar of incense.

2 Chronicles 32:25 But he did not render again according to the benefits which he had received, for his heart was lifted up: and wrath was enkindled against him, and against Juda and Jerusalem.

Deuteronomy 8:14 Thy heart be lifted up, and thou remember not the Lord thy God, who brought thee out of the land of Egypt, out of the house of bondage:

Proverbs 13:10 Among the proud there are always contentions: but they that do all things with counsel, are ruled by wisdom.

Proverbs 16:18 Pride goeth before destruction: and the spirit is lifted up before a fall.

Proverbs 28:25 He that boasteth and puffeth up himself, stirreth up quarrels: but he that trusteth in the Lord, shall be healed.

Daniel 5:20-23 But when his heart was lifted up, and his spirit hardened unto pride, he was put down from the throne of his kingdom, and his glory was taken away. . . .

Habakkuk 2:4 Behold, he that is unbelieving, his soul shall not be right in himself: but the just shall live in his faith.

James 4:6 But he giveth greater grace. Wherefore he saith: God resisteth the proud and giveth grace to the humble.

1 Peter 5:5 In like manner, ye young men, be subject to the ancients. And do you all insinuate humility one to another: for God resisteth the proud, but to the humble he giveth grace.

to boast

Jeremiah 9:23 Thus saith the Lord: Let not the wise man glory in his wisdom, and let not the strong man glory in his strength, and let not the rich man glory in his riches:

1 Corinthians 1:29 That no flesh should glory in his sight.

why shouldest

2 Chronicles 35:21 But he sent messengers to him, saying: What have I to do with thee, O king of Juda? I come not against thee this day, but I fight against another house, to which God hath commanded me to go in haste: forbear to do against God, who is with me, lest he kill thee.

Proverbs 18:6 The lips of a fool intermeddle with strife: and his mouth provoketh quarrels.

Proverbs 20:3 It is an honour for a man to separate himself from quarrels: but all fools are meddling with reproaches.

Proverbs 26:17 As he that taketh a dog by the ears, so is he that passeth by in anger, and meddleth with another man's quarrel.

Luke 14:31 Or, what king, about to go to make war against another king, doth not first sit down and think whether he be able, with ten thousand, to meet him that, with twenty thousand, cometh against him?