G1524–εἴσειμι–eiseimi

who, having seen Peter and John about to go into the temple, was begging to receive a kindness.

εἰσιέναι eisienai “to enter”

and on the morrow Paul was going in with us unto James, all the elders also came,

εἰσῄει eisēei “was going in”

Then Paul, having taken the men, on the following day, with them having purified himself, was entering into the temple, announcing the fulfilment of the days of the purification, till the offering was offered for each one of them.

εἰσῄει eisēei “was entering”

And these things having been thus prepared, into the first tabernacle, indeed, at all times the priests do go in, performing the services,

εἰσίασιν eisiasin “enter”