What.

Luke 3:8
Therefore produce fruit worthy of repentance. And do not begin to say to yourselves, 'We have Abraham as our father.' For I tell you that out of these stones God can raise up children for Abraham.

Acts 2:37
When the people heard this, they were cut to the heart and asked Peter and the other apostles, "Brothers, what shall we do?"

Acts 9:6
"Now get up and go into the city, and you will be told what you must do."

Acts 16:30
Then he brought them out and asked, "Sirs, what must I do to be saved?"