The First Love in the Bible

What do I mean the first love in the Bible is the first 'love word' in the Bible. It's in Genesis 22:2. It's not a romantic love. It's a painful love, wasn't it?

He said, "Take your son, your only son Isaac, whom you love, and go to the land of Moriah, and offer him there as a burnt offering on one of the mountains of which I shall tell you."
Gen 22:2, ESV
The first love in the Bible told us about sacrifice. Abraham must kill his one and only son and gave Isaac as a living sacrifice. It didn't happen, but it taught us that the first love was near with sacrifice.
And God, the Father has shown us His love to us when He has given His one and only Son, Jesus Christ to be the Savior of our sins. With love, Jesus has sacrificed himself.
The first love shown the real first love... God loves you..