Luke 1:6

6. Commandments and ordinances Commandments refer to the moral law, ordinances to the ritual.

Blameless Blameless even before God. Not blameless, indeed, as tried by the Christless law, which makes no allowance for infirmities; but blameless as living, through grace, under the atonement, in the undiminished approbation of God. So perfect was their faith, and so pure their life, that God imputed no blame unto them. This was their ordinary spiritual state; yet it excluded not the possibility of sin. For at a moment of trial Zacharias was betrayed into fault, and suffered a divine penalty.