Charles Spurgeon Commentary Acts 28:17

"And it came to pass, that after three days he called together those that were the chief of the Jews: and when they were come together, he said unto them, I, brethren, though I had done nothing against the people, or the customs of our fathers, yet was delivered prisoner from Jerusalem into the hands of the Romans:" — Acts 28:17 (ASV)

Paul called the chief of the Jews together:

There are said to have been seven synagogues in Rome at that time, so the apostle sent for a number of the chief men in the various congregations.

And it came to pass, that after three days –

That was quick work; he had only got into his house three days when he began to work: After three days –