Near as I can tell, there is only one place in the bible where God specifically says the three words together “I love you.”
This is what the LORD says—
he who created you,
he who formed you,
“Fear not, for I have redeemed you;
I have summoned you by name; you are mine.
When you pass through the waters,
I will be with you;
and when you pass through the rivers,
they will not sweep over you.
When you walk through the fire,
you will not be burned;
the flames will not set you ablaze.
For I am the LORD, your God,
the Holy One of Israel, your Savior;
Since you are precious and honored in my sight,
and because I love you,
– Adapted from Isaiah 43
Scripture taken from the Holy Bible, New International Version, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission of International Bible Society