Strong's numbers

ἐντολή (G1785)

entolḗ

en-tol-ay'

from ἐντέλλομαι; injunction, i.e. an authoritative prescription:--commandment, precept.

ἐντολή, -ῆς, ἡ (< ἐντέλλω, q.v.), [in LXX chiefly for מִצְוָה; in pl. freq. in Pss for פִּקּוּדִים ;]

1. generally, a charge, injunction, order, command: Lk 15:29, Jo 10:18 11:57 12:49, 50 14:31, Ac 17:15, Col 4:10; ἐ. σαρκίνη, He 7:16, 18

2. Esp. of religious precepts and commandments;

(a) of God's commandments: in OT, Mt 15:3 22:36, 38, 40 ; Mk 10:5, 19 12:28, 31 Eph 2:15, He 9:19; esp. of the decalogue, Mt 5:19 19:17, Mk 10:19, Lk 18:20 23:56, Ro 7:8-13 13:9, Eph 6:2; of God's commandments in general, Lk 1:6, I Co 7:19, I Jo 2:3-8 3:22-24 4:21 5:2, 3, Re 12:17 14:12; collectively, ἡ ἐ. (cf. τ. ἔργον τ. θεοῦ, Jo 6:29), I Ti 6:14, II Pe 2:21 3:2;

(b) of things commanded Christ by the Father: Jo 12:49, 50 14:31 15:10;

3. Phrases: seq. ἵνα, Jo 13:34 15:12, I Jo 3:23 4:21, II Jo 6; ἐντολὴν (ὰς) παραβαίνειν, Mt 15:3; ἀκυροῦν, Mt 15:6 Rec.; τηρεῖν, Mt 19:17, Jo 15:10, al.; ποιεῖν, I Jo 5:2; διδόναι, Jo 11:57; λαμβάνειν, Jo 10:18, II Jo 4; ἔχειν, Jo 14:21, He 7:5; ἐ. καὶ δικαιώματα, Lk 1:6; ἐντολαὶ ἀνθρώπων (of Jewish tradition), Tit 1:14; ἐ. καινή, Jo 13:34, I Jo 2:7, II Jo 5.†

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.

1 John 2:4
He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
1 John 2:7
Brethren, I write no new commandment unto you, but an old commandment which ye had from the beginning. The old commandment is the word which ye have heard from the beginning.
1 John 2:8
Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth.
1 John 3:22
And whatsoever we ask, we receive of him, because we keep his commandments, and do those things that are pleasing in his sight.
1 John 3:23
And this is his commandment, That we should believe on the name of his Son Jesus Christ, and love one another, as he gave us commandment.
1 John 3:24
And he that keepeth his commandments dwelleth in him, and he in him. And hereby we know that he abideth in us, by the Spirit which he hath given us.
1 John 4:21
And this commandment have we from him, That he who loveth God love his brother also.
1 John 5:2
By this we know that we love the children of God, when we love God, and keep his commandments.
1 John 5:3
For this is the love of God, that we keep his commandments: and his commandments are not grievous.
2 John 1:4
I rejoiced greatly that I found of thy children walking in truth, as we have received a commandment from the Father.