G1524–εἴσειμι–eiseimi

who, seeing Peter and John about to enter into the temple, asked to receive alms.

εἰσιέναι eisienai “to enter”

And on the morrow Paul went in with us to James, and all the elders came there.

εἰσῄει eisēei “was going in”

Then Paul, taking the men, on the next day, having been purified, entered with them into the temple, signifying the time the days of the purification would be fulfilled, until the offering was offered for every one of them.

εἰσῄει eisēei “was entering”

Now these things being thus ordered, into the first tabernacle the priests enter at all times, accomplishing the services;

εἰσίασιν eisiasin “enter”