'Observe' in the Bible

Then you will prosper, if you are careful to observe the statutes and the ordinances which the Lord commanded Moses concerning Israel. Be strong and courageous, do not fear nor be dismayed.

So now, in the sight of all Israel, the assembly of the Lord, and in the hearing of our God, observe and seek after all the commandments of the Lord your God so that you may possess the good land and bequeath it to your sons after you forever.