1 John 2:5

King James Version (KJV)

But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.

In context

3 And hereby we do know that we know him, if we keep his commandments.

4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.

5 But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.

6 He that saith he abideth in him ought himself also so to walk, even as he walked.

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.

Read the whole of 1 John 2

1 John 2:5 in every translation

KJV King James Version: But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.
WEB World English Bible: But God’s love has most certainly been perfected in whoever keeps his word. This is how we know that we are in him:
BSB Berean Standard Bible: But if anyone keeps His word, the love of God has been truly perfected in him. By this we know that we are in Him:
ASV American Standard Version: but whoso keepeth his word, in him verily hath the love of God been perfected. Hereby we know that we are in him:
YLT Young's Literal Translation: and whoever may keep his word, truly in him the love of God hath been perfected; in this we know that in him we are.
DBY Darby Translation: but whoever keeps his word, in him verily the love of God is perfected. Hereby we know that we are in him.
WBS Webster Bible: But whoever keepeth his word, in him verily is the love of God perfected: by this we know that we are in him.