The Catechism in Questions & Answers

57. What does it mean when we say: “God is the Loving One”?

Already in the old covenant, God revealed Himself as the Loving One by electing the people of Israel and liberating them from captivity in Egypt. He revealed Himself to all mankind as the Loving One by sending His Son for the salvation of all human beings. Apostle John wrote: “And we have known and believed the love that God has for us. God is love, and he who abides in love abides in God, and God in him” (1 John 4: 16).

“Yes, I have loved you with an everlasting love; therefore with loving kindness I have drawn you.”
Jeremiah 31: 3
“For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life.”
John 3: 16