Luke 1:67

The Holy Spirit now filled (i.e., controlled) Zechariah, as He had Elizabeth (Luke 1:41) and John (Luke 1:15). He enabled the priest to prophesy. Zechariah proceeded to utter a psalm of praise in which he gave God’s explanation of the significance of the events that had begun to happen in fulfillment of Old Testament prophecy.

"Observe that Zechariah’s previous doubt and his discipline through loss of speech did not mean the end of his spiritual ministry. So when a believer today has submitted to God’s discipline, he may go on in Christ’s service." [Note: Liefeld, p. 839.]

Zechariah’s failure had been relatively minor, so major discipline was unnecessary.