Acts 1:3

1:3 To the same apostles also, after his suffering, he presented himself alive with many convincing proofs. He was seen by them over a forty-day period and spoke about matters concerning the kingdom of God.

Acts 1:9-10

1:9 After he had said this, while they were watching, he was lifted up and a cloud hid him from their sight. 1:10 As they were still staring into the sky while he was going, suddenly two men in white clothing stood near them