Jeremiah 20:12

10 For I heard the defaming of many, fear on every side. Report, say they, and we will report it. All my familiars watched for my halting, saying, Peradventure he will be enticed, and we shall prevail against him, and we shall take our revenge on him.

11 But the LORD is with me as a mighty terrible one: therefore my persecutors shall stumble, and they shall not prevail: they shall be greatly ashamed; for they shall not prosper: their everlasting confusion shall never be forgotten.

But, O LORD of hosts, that triest the righteous, and seest the reins and the heart, let me see thy vengeance on them: for unto thee have I opened my cause.

13 Sing unto the LORD, praise ye the LORD: for he hath delivered the soul of the poor from the hand of evildoers.

14 Cursed be the day wherein I was born: let not the day wherein my mother bare me be blessed.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
O LORD of Hosts, who examines the righteous, who sees the heart and mind, let me see Your vengeance upon them, for to You I have committed my cause.
KJV
But, O LORD of hosts, that triest the righteous, and seest the reins and the heart, let me see thy vengeance on them: for unto thee have I opened my cause.
WEB
But the LORD of Armies, who tests the righteous, who sees the heart and the mind, let me see your vengeance on them, for I have revealed my cause to you.
ASV
But, O Jehovah of hosts, that triest the righteous, that seest the heart and the mind, let me see thy vengeance on them; for unto thee have I revealed my cause.
DARBY
And thou, Jehovah of hosts, who triest the righteous, who seest the reins and the heart, let me see thy vengeance on them; for unto thee have I revealed my cause.
BLB
And YHWH of Hosts, the One testing the righteous, the One seeing the kidneys and mind, let me see Your vengeance on them! For to you I have uncovered my dispute.
ÅB
Og Herren, hærskarenes Gud, prøver med rettferdighet, han ser nyrer og hjerte; jeg skal se din hevn over dem, for jeg har lagt min sak fram for deg.
OTB
Herren, hærskarenes Gud, du som prøver den rettferdige og ser hjertet og sinnet, la meg se din hevn over dem, for til deg har jeg overgitt min sak.
B1930
Og Herren, hærskarenes Gud, prøver med rettferdighet, han ser nyrer og hjerte; jeg skal se din hevn over dem, for jeg har lagt min sak frem for dig.

Study notes (Tyndale)

Original text and word study

Cross references