John 7:17

If any one is desirous to do his will, he will know concerning the teaching, whether it is from God, or whether I speak from myself.

1 John 2:3-4

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

Treasury of Scripture Knowledge

Summary

LORD, I have hoped for thy salvation, and done thy commandments.

Bible References

And done

John 7:17
If any one is desirous to do his will, he will know concerning the teaching, whether it is from God, or whether I speak from myself.
1 John 2:3
And hereby we know that we know him, if we keep his commandments.