Acts 18:27 AMPC

[27] And when [Apollos] wished to cross to Achaia (most of Greece), the brethren wrote to the disciples there, urging and encouraging them to accept and welcome him heartily. When he arrived, he proved a great help to those who through grace (God's unmerited favor and mercy) had believed (adhered to, trusted in, and relied on Christ as Lord and Savior).