believe in the name of the Son and love one another.
1st John chapter 3.
Here are some other commandments from 1 John:
1. Do not say you have fellowship with God but walk in the dark...you will be lying.
2. Walk in the light as He is in the light.
3. Confess your sins.
4. Do not think you have no sin.
5. Keep His commandments.
6. If you do not keep His commandments, you are a liar.
7. Be perfected.
8. Walk in the same manner as Jesus walked.
9. The one who says he is in the light but hates his brother is in the darkness.
10. Love your brother and abide in the light.
11. Do not let the darkness blind your eyes.
12. Overcome the evil one.
13. Come to know God.
14. Do not love the world.
15. Do the will of the Father so you can live forever.
The above covers 1 John 1:1 to 2:16
and there are still 3 1/2 chapters.
The N.T. is chock full of commands...
it's just that some prefer not to see them....