Mark 12:33

and To love Him with all one's heart, with all one's understanding, and with all one's strength, and to love one's fellow man no less than oneself, is far better than all our whole burnt-offerings and sacrifices."

Matthew 9:13

But go and learn what this means, 'It is mercy that I desire, not sacrifice'; for I did not come to appeal to the righteous, but to sinners."

Matthew 12:7

And if you knew what this means, 'It is mercy I desire, not sacrifice', you would not have condemned those who are without guilt.

Hebrews 10:8

After saying the words I have just quoted, "Sacrifices and offerings or whole burnt-offerings and sin-offerings Thou hast not desired or taken pleasure in" --all such being offered in obedience to the Law--

1 Corinthians 13:1-3

If I can speak with the tongues of men and of angels, but am destitute of Love, I have but become a loud-sounding trumpet or a clanging cymbal.

Treasury of Scripture Knowledge

Summary

And to love him with all the heart, and with all the understanding, and with all the soul, and with all the strength, and to love his neighbour as himself, is more than all whole burnt offerings and sacrifices.

General references

Bible References

Is more

Matthew 9:13
But go and learn what this means, 'It is mercy that I desire, not sacrifice'; for I did not come to appeal to the righteous, but to sinners."
Matthew 12:7
And if you knew what this means, 'It is mercy I desire, not sacrifice', you would not have condemned those who are without guilt.
1 Corinthians 13:1
If I can speak with the tongues of men and of angels, but am destitute of Love, I have but become a loud-sounding trumpet or a clanging cymbal.

General references

Matthew 22:36
"Teacher, which is the greatest Commandment in the Law?"
1 John 4:21
And the command which we have from Him is that he who loves God must love his brother man also.