Acts 18:27

And when he was minded to pass over into Achaia, the brethren encouraged him, and wrote to the disciples to receive him: and when he was there, he helped them much that had believed through grace; for he powerfully confuted the Jews, and that publicly, showing by the scriptures that Jesus was the Christ.

These two verses extol the effectiveness of Apollos in answering Jewish objections to Christ as Lord and Messiah; and his effectiveness led to support and encouragement by brethren throughout the area. It may be accepted as certain that Aquila and Priscilla were leaders in sponsoring and encouraging this effective new voice for the Lord.

Paul himself advocated and encouraged Apollos' work (1 Corinthians 16:12); and in this passage, Luke, Paul's great friend and companion, speaks of the noble Alexandrian in terms of unstinted praise and appreciation. How wonderful that among such great leaders there was no hint of jealousy.

Pass over into Achaia ... This indicates that Apollos went to Corinth, the capital of Achaia, where the carnality of the Corinthians promptly led to the development of a faction calling itself after Apollos (1 Corinthians 1:12). No doubt Apollos' work there was very successful, for Paul himself affirmed that "I planted, Apollos watered; but it is God who giveth the increase" (1 Corinthians 3:6).