What specific instance is mentioned by Peter?

Answer

'Men and brethren, this scripture must needs have been fulfilled, which the Holy Ghost by the mouth of
David spoke before concerning Judas, which was guide to them that took Jesus!' Acts 1: 16.

Of whom was Christ to be born?
How is unity preserved in the diversities of gifts?
How was the prophecy given?
What answer did Elijah make?
What did the prophet Isaiah predict of Christ?
To what place did Jesus retire for secret devotion?
What peaceful condition will reign throughout the earth then?

Questions & Answers are from the book Bible Readings for the Home Circle