Kehillah in Corinth I 15:57-58

Orthodox Jewish Bible

⁵⁷ But Baruch Hashem, Who is giving us the nitzachon (victory) through Adoneinu Rebbe, Melech HaMoshiach.

⁵⁸ So then, Chaverim and Achim b’Moshiach of mine, be steadfast, immovable, abounding always in the avodas kodesh of Adoneinu, have da’as that your po’al (work) is not in vain in Hashem [2Ch 15:7; Isa 65:23].