“I beseech you, brethren, (ye know the house of Stephanas, that it is the first fruits of Achaia, and that they haue addicted themselues to the ministery of the Saints,)”
1611 King James Version (KJV)
16:15 The first fruits of Achaia - The first converts in that province.
1Co 16:15 The house of Stephanas Paul had baptized the household of Stephanas. See PNT "1Co 1:16". The first fruits of Achaia. They were his first converts at Corinth.