G1524–εἴσειμι–eiseimi

Seeing Peter and John about to go into the Temple, he asked them for alms.

εἰσιέναι eisienai “to enter”

On the following day we went with Paul to call on James, and all the Elders of the Church came also.

εἰσῄει eisēei “was going in”

So Paul associated with the men; and the next day, having purified himself with them, he went into the Temple, giving every one to understand that the days of their purification were finished, and there he remained until the sacrifice for each of the

εἰσῄει eisēei “was entering”

These arrangements having long been completed, the priests, when conducting the divine services, continually enter the outer tent.

εἰσίασιν eisiasin “enter”