On the seven days see verses 23 and 26 above. A Nazirite who was in a state of defilement would shave his head on the seventh day and offer the required sacrifices on the eighth day (see again Numbers 6.9-12).

The church elders had believed that the Jewish Christians might be the source of trouble for Paul (see v. 20), but as it turned out, some Jews from the province of Asia were the ones who caused Paul his difficulty.

Stirred up the whole crowd may be readily translated as “caused the whole crowd to become excited,” “caused the whole crowd to become angry,” or “caused the whole crowd to riot.”

Quoted with permission from Newman, Barclay M. and Nida, Eugene A. A Handbook on The Acts of the Apostles. (UBS Handbook Series). New York: UBS, 1972. For this and other handbooks for translators see here .