'Faithfulness' in the Bible

Righteousness will be a belt around His loins;faithfulness will be a belt around His waist.

Yahweh, You are my God;I will exalt You. I will praise Your name,for You have accomplished wonders,plans formed long ago, with perfect faithfulness.

For Sheol cannot thank You;Death cannot praise You.Those who go down to the Pitcannot hope for Your faithfulness.

The living, only the living can thank You,as I do today;a father will make Your faithfulness known to children.