Jesus reads Isaiah 61 in His first sermon at Nazareth, and says that He fulfills prophets’ promise of an anointed Servant to preach good news to the poor (Luke 4). It is a programmatic sermon for Luke’s gospel, who highlights Jesus’ ministry among the marginal and weak.
In the ensuing exchange with the people of Nazareth, Jesus refers to Elijah’s ministry to the widow of Zarephath and Elisha’s cleansing of Naaman. Apparently the mission to the poor encompasses ministry to the Gentiles, who do not enjoy the riches of Israel.
Once we get that clear, then Luke 4 becomes a programmatic sermon for Acts as well. What Jesus began to do and teach among the poor is found in Luke; how Jesus continued to preach good news to the poor is the story of Acts. The accent shifts from the poor within Israel to poor Gentiles.