Tradition
St. Cyril of Jerusalem
Catechetical Lectures
Book 16 › Introduction
On the Article, And in One Holy Ghost, the Comforter, Which Spoke in the Prophets.
1 Corinthians 12:1, 4
Now concerning spiritual gifts, brethren, I would not have you ignorant....Now there are diversities of gifts, but the same Spirit, etc.
Source: Catechetical Lectures (New Advent)