Kehillah in Corinth I 16:7-9

Orthodox Jewish Bible

⁷ For I do not want to see you now in passing, for I have the tikvah to remain some time with you, im yirtzeh Hashem (G-d willing, permitting).

⁸ But, I will remain on in Ephesus until Shavuos [Lv 23:15-21; Dt 16:9-11],

⁹ For a delet (door) has opened, great and effective, for me, but there are many mitnaggedim (opponents).