Kehilah In Corinth 1 15:58 Orthodox Jewish Bible (OJB)

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].