Now when the high priest and the captain of the temple and the chief priests heard these things, they doubted of them whereunto this would grow.

Now when the captain of the temple and the chief priests heard these words, they were much perplexed concerning them whereunto this would grow.

Now when the officer of the temple and the chief priests heard these words, they were in doubt concerning them, what would come to pass.

And when they heard these words, both the priest and the captain of the temple and the chief priests were in perplexity as to them, what this would come to.

Now when the high priest, and the captain of the temple, and the chief priests heard these things, they doubted of them to what this would grow.

And as the priest, and the magistrate of the temple, and the chief priests, heard these words, they were doubting concerning them to what this would come;

When the Commander of the Temple Guards and the High Priests heard this statement, they were utterly at a loss with regard to it, wondering what would happen next.

Now, at these words, the captain of the Temple and the chief priests were greatly troubled about what might be the end of this business.

Then, when the magistrate of the temple and the chief priests heard these words, they were uncertain about them, as to what should happen.

When the officer in charge at the Temple and the chief priests heard their story, they were perplexed about the apostles and as to what all this would lead to.

The captain of the temple - See the notes on Acts 4:1.
Doubted of them - They were in "perplexity" about these things. The word rendered "doubted" denotes "that state of anxiety which arises when a person has lost his way, or when he does not know what to do to escape from a difficulty." See Luke 9:7.
Whereunto this would grow - What this "would be"; or, what would be the result or end of these events. For:
(1) Their authority was disregarded.
(2) God had opposed them by a miracle.
(3) the doctrines of the apostles were gaining ground.
(4) their efforts to resist them had been in vain. They need "not" have doubted; but sinners are not disposed to be convinced of the truth of religion.

They doubted of them whereunto this would grow - They did not know what to think of the apostles, whether they had saved themselves by magic, or whether they were delivered by a real miracle; and they were at a loss to tell what the issue of these things would be.

Now when the high priest,.... Or "the priests", as it is read in most copies; the Complutensian edition reads, "the high priest"; and he is certainly designed, since he is distinguished from the chief priests after mentioned: the Vulgate Latin, Syriac, and Ethiopic versions, leave out this word; as does also the Alexandrian copy:
and the captain of the temple; the same versions read in the plural number; See Gill on Luke 22:4, Luke 22:52, Acts 4:1.
and the chief priests heard these things; which the officers related, that the prison doors were shut and sure, and the keepers upon their watch, and yet the apostles gone:
they doubted of them, whereunto this would grow; they did not doubt of the truth of the things their officers told them, but they were amazed at them, and hesitated in their minds about them, and were anxiously thoughtful; what this would, or should be, or how this should be done; that the prison doors should be shut, and yet the prisoners gone; they were in suspense and anxiety of mind, what to impute it to; whether to a divine and supernatural power, or to magic art; and were uneasy in their minds what would be the issue of so strange and surprising an event.

they doubted--"were in perplexity."

They doubted what this should be - They were even at their wits' end. The world, in persecuting the children of God, entangle themselves in numberless difficulties.