They were both righteous before God, walking blamelessly in all the commandments and ordinances of the Lord.
Blameless - That is, no fault or deficiency could be found in them. They were strict, exact, punctual. Yet this, if it had been mere “external” observance, might have been no proof of piety. Paul, before his conversion, also kept the law “externally” blameless, Philippians 3:6. But in the case of Zechariah and Elizabeth it was real love to God and sincere regard for his law.