Albert Barnes Commentary Luke 1:21

"And the people were waiting for Zacharias, and they marvelled while he tarried in the temple." — Luke 1:21 (ASV)

The people waited. That is, beyond the usual time.

Marvelled. Wondered. The priest, it is said, was not accustomed to remain in the temple more than half an hour usually. Having remained on this occasion a longer time, the people became apprehensive of his safety, and wondered what had happened to him.