"After his suffering, He presented himself alive to them by many convincing proofs, appearing to them during forty days and speaking about the kingdom of God" (
Acts 1:3).
"The Lord Jesus, after he had spoken to them, was taken up into heaven, and sat down at the right hand of God. And they went forth and preached everywhere, while the Lord worked with them and confirmed the message by the signs that attended it. Amen." (
Mark 16:15-20).