G2171–εὐχή–euchē

And Paul, having yet stayed [supplied: there] many days, took leave of the brethren and sailed thence to Syria, and with him Priscilla and Aquila, having shorn his head in Cenchrea, for he had a vow;

εὐχήν. euchēn “a vow.”

This do therefore that we say to thee: We have four men who have a vow on them;

εὐχὴν euchēn “a vow”

and the prayer of faith shall heal the sick, and the Lord shall raise him up; and if he be one who has committed sins, it shall be forgiven him.

εὐχὴ euchē “prayer”