Greek core word #189 · numeral · 88 times in the New Testament

ἑπτά

hep-TAH

ἑπτά — seven

Indeclinable numeral: the same form for every case and gender.
Prominent in Revelation (seven churches, seals, trumpets, bowls).

There is no table of forms for this word (numeral).

Where you meet it

First met in passage 17, Mark 8:5.

From Appendix B of the Greek and Latin with Jerome study companion · PDF page 227 · open the PDF here