Jesus said that they would tell about him everywhere, and then he ascended to heaven.

Acts 1:6-9

6 One day when the apostles met together with Jesus, they asked him, “Lord, will you (sg) now become the King [MET] over us Israelite people like King David, who ruled long ago?” (OR, “Lord, will you (sg) now defeat the Romans and restore the kingdom to us Israelite people?”) 7 He replied to them, “You do not need to know the time periods and days when that will happen. My Father alone has decided when he will make me king. 8 But you do need to know that the Holy Spirit will make you spiritually strong when he comes to live in you. Then you will powerfully tell people about me in Jerusalem and in all the other places in Judea district, in Samaria district, and in places far away all over [IDM] the world.” 9 After he said that, he was taken {God took him} up to heaven, while they were watching. He went up into a cloud [PRS], which prevented them from seeing him any more.