Zkharyāh (Zechariah) 2:15

And the scribe said to him, "You are right, Teacher; you have truly said that he is one, and there is no other but he; and to love him with all the heart, and with all the understanding, and with all the strength, and to love one's neighbor as oneself, is much more than all whole burnt offerings and sacrifices."

Mark 12:32–33

If you are unthankful, God is independent of you, yet He approves not unthankfulness in His servants; but if you are thankful, He will approve it in you. And no soul laden bears the load of another. Then to your Lord shall you return, and He will tell you what you have been doing. He knows the thoughts within the breasts.

Az-Zumar (Surah 39) 7