Verses with the word hurtful in the Old Testament (2 verses):

Ezra 4:15
That search may be made in the book of the records of thy fathers: so shalt thou find in the book of the records, and know that this city is a rebellious city, and hurtful unto kings and provinces, and that they have moved sedition within the same of old time: for which cause was this city destroyed.

Psalms 144:10
It is he that giveth salvation unto kings: who delivereth David his servant from the hurtful sword.