Mark 10:18

And Jesus answered him, "Why do you call me perfectly good? No one is perfectly good but God Himself.

Matthew 19:17

And He answered him, "Why do you ask me about what is good? There is only One who is perfectly good. But if you want to get into that life, you must practice keeping the commandments."

Luke 18:19

Jesus said to him, "Why do you call me perfectly good? No one is perfectly good but God Himself.

John 5:41-44

I do not accept any honor from men,

Romans 3:12

They all have turned aside, all have become corrupt; No one does good, not even one!

James 1:17

Every good gift and every perfect boon is from above, and comes down from the Father of lights, in whom there is no variation or changing shadow.

1 John 4:8

Whoever does not love has never come to know God by experience, because God is love.

1 John 4:16

So we know by experience and trust the love that God has for us. God is love, and whoever continues to love continues in union with God and God in union with him.

Treasury of Scripture Knowledge

Summary

And Jesus said unto him, Why callest thou me good? there is none good but one, that is, God.

Bible References

Why

Matthew 19:17
And He answered him, "Why do you ask me about what is good? There is only One who is perfectly good. But if you want to get into that life, you must practice keeping the commandments."
Luke 18:19
Jesus said to him, "Why do you call me perfectly good? No one is perfectly good but God Himself.
John 5:41
I do not accept any honor from men,
Romans 3:12
They all have turned aside, all have become corrupt; No one does good, not even one!

That is

James 1:17
Every good gift and every perfect boon is from above, and comes down from the Father of lights, in whom there is no variation or changing shadow.
1 John 4:8
Whoever does not love has never come to know God by experience, because God is love.