It is Jesus' statement, which the Vatican, as followers of Jesus, would be interested in.
But Jesus himself is quoting the Torah:
> “Hear, O Israel: [a]The Lord our God, the Lord is one! 5 You shall love the Lord your God with all your heart, with all your soul, and with all your strength.
https://en.wikipedia.org/wiki/Great_Commandment
It is Jesus' statement, which the Vatican, as followers of Jesus, would be interested in.
But Jesus himself is quoting the Torah:
> “Hear, O Israel: [a]The Lord our God, the Lord is one! 5 You shall love the Lord your God with all your heart, with all your soul, and with all your strength.
* https://www.biblegateway.com/passage/?search=Deuteronomy%206...
> “‘Do not seek revenge or bear a grudge against anyone among your people, but love your neighbor as yourself. I am the Lord.
* https://www.biblegateway.com/passage/?search=Leviticus%2019%...