Titus 3

Titus 3:8,9 (KJV)
8 This is a faithful saying, and these things I will that thou affirm constantly, that they which have believed in God might be careful to maintain good works. These things are good and profitable unto men.
9 But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are unprofitable and vain.

Titus 3:7,8 (KJV)
7 That being justified by his grace, we should be made heirs according to the hope of eternal life.
8 This is a faithful saying, and these things I will that thou affirm constantly, that they which have believed in God might be careful to maintain good works. These things are good and profitable unto men.