A.T. Robertson Commentary Luke 22:66

"And as soon as it was day, the assembly of the elders of the people was gathered together, both chief priests and scribes; and they led him away into their council, saying," — Luke 22:66 (ASV)

As soon as it was day (ως εγενετο ημερα). Mr 15:1 (Matthew 27:1) has "morning."

The assembly of the people (το πρεσβυτεριον του λαου). The technical word for "the eldership" (from πρεσβυτερος, an old man or elder) or group of the elders composing the Sanhedrin. The word occurs in the LXX for the Sanhedrin. In the N.T. occurs only here and Ac 22:5 of the Sanhedrin. In 1 Timothy 4:14 Paul uses it of the elders in a church (or churches). The Sanhedrin was composed of the elders and scribes and chief priests and all three groups are at this meeting. Luke's language (both chief priests and scribes, τε... κα) seems to apply the word πρεσβυτεριον to the whole Sanhedrin. Sadducees (chief priests) and Pharisees (scribes) were nearly equally represented.

Into their council (εις το συνεδριον αυτων). The place of the gathering is not given, but Jesus was led into the council chamber.