'Gratitude' in the Bible

They forbid marriage and demand abstinence from foods that God created to be received with gratitude by those who believe and know the truth.

For everything created by God is good, and nothing is to be rejected if it is received with gratitude;

But if a widow has children or grandchildren, let these learn first to show piety towards their own homes and to prove their gratitude to their parents; for this is well pleasing in the sight of God.