[Salvation]

On the ninth day of Christmas, my True Love gave to me, nine ladies
dancing.
This verse is a reference to the nine fruits of the Spirit listed in Gal
5:22-23. "The fruit of the Spirit is love, joy, peace, patience,
kindness, generosity, faithfulness, gentleness and self-control."

[Salvation]

On the tenth day of Christmas, my True Love gave to me, ten lords
a-leaping.
These ten lords represent the Ten Commandments, also known as
the Decalogue, and are handed on to us in the books of Exodus and
Deuteronomy.
In the book of Exodus, the Commandments are found at Ex 20:1-17.
I the LORD am your God who brought you out of the land of Egypt.
You shall have no other gods besides me.
You shall not take the name of the LORD, your God, in vain.
Remember to keep holy the sabbath day.
Honor your father and your mother.
You shall not kill.
You shall not commit adultery.
You shall not steal.
You shall not bear false witness against your neighbor.
You shall not covet your neighbors house, nor anything else that
belongs to him. (abridged, from Ex 20:1-17)