Deuterocanon

Sirach 10:13

Ben Sira, Ecclesiasticus

11 For when one is dead he inherits maggots and vermin and worms. 12 The beginning of human pride is to forsake the Lord; the heart has withdrawn from its Maker. 13 For the beginning of pride is sin, and the one who clings to it pours out abominations. Therefore the Lord brings upon them unheard-of calamities, and destroys them completely. 14 The Lord overthrows the thrones of rulers, and enthrones the lowly in their place. 15 The Lord plucks up the roots of the nations, and plants the humble in their place.

Date: 195-175 B.C.E.
* Dates are based on scholarly estimates

Augustine City of God 14.13

On the City of God Against the Pagans

Our first parents fell into open disobedience because already they were secretly corrupted; for the evil act had never been done had not an evil will preceded it. And what is the origin of our evil will but pride? For pride is the beginning of sin. And what is pride but the craving for undue exaltation? And this is undue exaltation, when the soul abandons Him to whom it ought to cleave as its end, and becomes a kind of end to itself. This happens when it becomes its own satisfaction. And it does so when it falls away from that unchangeable good which ought to satisfy it more than itself.

Date: 426 C.E.
* Dates are based on scholarly estimates