'Cruel' in the Bible

Lest thou give thine honor unto others, And thy years unto the cruel;

The merciful man doeth good to his own soul; But he that is cruel troubleth his own flesh.

A righteous man regardeth the life of his beast; But the tender mercies of the wicked are cruel.

An evil man seeketh only rebellion; Therefore a cruel messenger shall be sent against him.

Wrath is cruel, and anger is overwhelming; But who is able to stand before jealousy?