G1524–εἴσειμι–eiseimi

Who, seeing Peter and John about to go into the temple, asked an alms.

εἰσιέναι eisienai “to enter”

And the day following Paul went in with us to James: and all the elders were present.

εἰσῄει eisēei “was going in”

Then Paul took the men, and the next day purifying himself with them, entered into the temple, to signify the accomplishment of the days of purification, until an offering should be offered for every one of them.

εἰσῄει eisēei “was entering”

Now when these things were thus ordained, the priests went always into the first tabernacle, accomplishing the service of God:

εἰσίασιν eisiasin “enter”