Verses with the word stubborn in the Apocrypha (2 verses):

Sirach 3:26
A stubborn heart shall fare evil at the last; and he that loveth danger shall perish therein.

Sirach 30:12
Bow down his neck while he is young, and beat him on the sides while he is a child, lest he wax stubborn, and be disobedient unto thee, and so bring sorrow to thine heart.