1 John 3:18

16 Hereby perceive we the love of God, because he laid down his life for us: and we ought to lay down our lives for the brethren.

17 But whoso hath this world’s good, and seeth his brother have need, and shutteth up his bowels of compassion from him, how dwelleth the love of God in him?

My little children, let us not love in word, neither in tongue; but in deed and in truth.

19 And hereby we know that we are of the truth, and shall assure our hearts before him.

20 For if our heart condemn us, God is greater than our heart, and knoweth all things.

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

Compare

BSB
Little children, let us love not in word and speech, but in action and truth.
KJV
My little children, let us not love in word, neither in tongue; but in deed and in truth.
WEB
My little children, let’s not love in word only, or with the tongue only, but in deed and truth.
ASV
[My] Little children, let us not love in word, neither with the tongue; but in deed and truth.
DARBY
Children, let us not love with word, nor with tongue, but in deed and in truth.
BLB
Little children, may we love not in word nor in tongue, but in work and in truth.
ÅB
Mine barn! la oss ikke elske med ord eller med tunge, men i gjerning og sannhet!
OTB
Små barn, la oss ikke elske med ord eller tale, men med handlinger og i sannhet.
B1930
Mine barn! la oss ikke elske med ord eller med tunge, men i gjerning og sannhet!

Study notes (Tyndale)

Original text and word study

Cross references