Strong's numbers

τέλειος (G5046)

téleios

tel'-i-os

from τέλος; complete (in various applications of labor, growth, mental and moral character, etc.); neuter (as noun, with ὁ) completeness:--of full age, man, perfect.

Abbott–Smith

τέλειος, -α, -ον (< τέλος), [in LXX chiefly for שָׁלֵם, תָּמִים and cogn. forms ;]

having reached its end, finished, mature, complete, perfect;

1. of persons, primarily of physical development,

(a) full-grown, mature: He 5:14; ethically: Phl 3:15; opp. to νήπιος (-άζειν), I Co 2:6 14:20, Eph 4:13; τ. καὶ πεπληροφορημένοι, Col 4:12; τ. ἐν Χριστῷ, Col 1:28;

(b) complete, perfect (expressing the simple idea of complete goodness, without reference either to maturity or to the philosophical idea of a τέλος; v. Hort on Ja 1:4): Mt 5:48 19:21, Ja 1:4 3:2; of God, Mt 5:48.

2. Of things, complete, perfect: Ro 12:2; ἔργον, Ja 1:4; νόμος, ib. 25; δώρημα, ib. 17; ἀγάπη, I Jo 4:18; τὸ τ., I Co 13:10; compar., τελειοτέρα (σκηνή), He 9:11.

(There is probably no reference in St. Paul's usage to the use of this term in the ancient mysteries; cf. ICC on Col 1:28; but v. also Lft., in l, and Notes, 173 f.) †

SYN.: v.s. ὁλόκληρος (and cf. Rendall, He., 158 ff.)

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

17 occurrences

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

Matthew 5:48
Be ye therefore perfect, even as your Father which is in heaven is perfect.
Matthew 19:21
Jesus said unto him, If thou wilt be perfect, go and sell that thou hast, and give to the poor, and thou shalt have treasure in heaven: and come and follow me.
Romans 12:2
And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.
1 Corinthians 2:6
Howbeit we speak wisdom among them that are perfect: yet not the wisdom of this world, nor of the princes of this world, that come to nought:
1 Corinthians 13:10
But when that which is perfect is come, then that which is in part shall be done away.
1 Corinthians 14:20
Brethren, be not children in understanding: howbeit in malice be ye children, but in understanding be men.
Ephesians 4:13
Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:
Philippians 3:15
Let us therefore, as many as be perfect, be thus minded: and if in any thing ye be otherwise minded, God shall reveal even this unto you.
Colossians 1:28
Whom we preach, warning every man, and teaching every man in all wisdom; that we may present every man perfect in Christ Jesus:
Colossians 4:12
Epaphras, who is one of you, a servant of Christ, saluteth you, always labouring fervently for you in prayers, that ye may stand perfect and complete in all the will of God.