Sit not down (mē kataklithēis). First aorist (ingressive) passive subjunctive of kataklinō, to recline. Old verb, but peculiar to Luke in the N.T. (Luk 7:36; Luk 9:14; Luk 14:8; Luk 24:30).
Be bidden (ēi keklēmenos). Periphrastic perfect passive subjunctive of kaleō after mē pote.