A.T. Robertson Commentary Acts 23:7

"And when he had so said, there arose a dissension between the Pharisees and Sadducees; and the assembly was divided." — Acts 23:7 (ASV)

When he had so said (τουτο αυτου λαλουντος). Genitive absolute of present participle (Westcott and Hort) rather than aorist (ειποντος). While he was saying this.

A dissension (στασις). This old word for standing or station (Hebrews 9:8) from ιστημ, to place, we have seen already to mean insurrection (Acts 19:40 which see). Here it is strife as in 15:2.

Was divided (εσχισθη). See on 14:4.