Strong's numbers

δικαιόω G1344

dikaióō

dik-ah-yo'-o

from δίκαιος; to render (i.e. show or regard as) just or innocent:--free, justify(-ier), be righteous.

δικαιόω, -ῶ (< δίκαιος), [in LXX chiefly for צדק pi., hi., (1) as Ez 16:51, Je 3:11 (cf. NT usage); (2) as De 25:1; Ex 23:7, Is 50:8 ;]

1. in cl.,

(a) c. acc rei, to deem right;

(b) c. acc pers., to do one justice; pass., δικαιοῦσθαι, to be treated rightly, opp. to ἀδικεῖσθαι.

2. In NT, as in LXX, and as usual with verbs in -όω from adjectives of moral meaning;

(1) to show to be righteous: Mt 11:19, Lk 7:35, Ro 3:4 (LXX), I Ti 3:16;

(2) to declare, pronounce righteous: Lk 7:29 10:29 16:15 18:14, Ro 2:13 3:24, 26, 28 4:5 8:30, 33, Tit 3:7; seq. ἀπό, Mt 11:19, Lk 7:35, Ac 13:39, Ro 6:7; ἐκ πίστεως, Ro 3:30 5:1, Ga 2:16 3:8, 24; ἐξ ἔργων, Ro 3:20 (LXX) 4:2, Ga 2:16, Ja 2:21, 24, 25; ἐκ τ. λόγων, Mt 12:37; διὰ τ. πίστεως, Ro 3:30; c. dat., Ro 3:24, 28, Tit 3:7; seq. ἐν, Ac 13:39, Ro 3:4 5:9, I Co 4:4 6:11, Ga 2:17 3:11 5:4, I Ti 3:16 (v. Cremer, 193, 693; DB, ii, 826 ff.).†

From G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), in the public domain.

Shown in the King James Version (KJV), whichever translation you read in — it is the text these numbers are tagged against.

Matthew 11:19
The Son of man came eating and drinking, and they say, Behold a man gluttonous, and a winebibber, a friend of publicans and sinners. But wisdom is justified of her children.
Matthew 12:37
For by thy words thou shalt be justified, and by thy words thou shalt be condemned.
Luke 7:29
And all the people that heard him, and the publicans, justified God, being baptized with the baptism of John.
Luke 7:35
But wisdom is justified of all her children.
Luke 10:29
But he, willing to justify himself, said unto Jesus, And who is my neighbour?
Luke 16:15
And he said unto them, Ye are they which justify yourselves before men; but God knoweth your hearts: for that which is highly esteemed among men is abomination in the sight of God.
Luke 18:14
I tell you, this man went down to his house justified rather than the other: for every one that exalteth himself shall be abased; and he that humbleth himself shall be exalted.
Acts 13:39
And by him all that believe are justified from all things, from which ye could not be justified by the law of Moses.
Romans 2:13
(For not the hearers of the law are just before God, but the doers of the law shall be justified.
Romans 3:4
God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged.