Cyrene.

Acts 2:10
Phrygia and Pamphylia, Egypt and the parts of Libya near Cyrene; visitors from Rome,

Acts 6:9
But resistance arose from what was known as the Synagogue of the Freedmen, including Cyrenians, Alexandrians, and men from the provinces of Cilicia and Asia. They began to argue with Stephen,

Acts 13:1
In the church at Antioch there were prophets and teachers: Barnabas, Simeon called Niger, Lucius of Cyrene, Manaen (a childhood companion of Herod the tetrarch), and Saul.

Matthew 27:32
Along the way they found a man from Cyrene, named Simon, and they forced him to carry the cross of Jesus.

the Grecians.

Acts 6:1
In those days when the disciples were increasing in number, the Grecian Jews began to grumble against the Hebraic Jews, because their widows were being overlooked in the daily distribution of food.

Acts 9:29
He talked and debated with the Grecian Jews, but they tried to kill him.

preaching.

Acts 8:5, 35
Philip went down to a city in Samaria and proclaimed the Christ to them. . . .

Acts 9:20
Saul promptly began to proclaim Jesus in the synagogues, declaring, "He is the Son of God."

Acts 17:18
Some Epicurean and Stoic philosophers also began to debate with him. Some of them asked, "What is this babbler trying to say?" while others said, "He seems to be advocating foreign gods." They said this because Paul was proclaiming the good news of Jesus and the resurrection.

1 Corinthians 1:23, 24
but we preach Christ crucified, a stumbling block to Jews and foolishness to Gentiles, . . .

1 Corinthians 2:2
For I decided to know nothing while I was with you except Jesus Christ and Him crucified.

Ephesians 3:8
Though I am less than the least of all the saints, this grace was given me: to preach to the Gentiles the unsearchable riches of Christ,