Acts 1:3-5

After He had suffered, He also presented Himself alive to them by many convincing proofs, appearing to them during 40 days and speaking about the kingdom of God. While He was together with them, He commanded them not to leave Jerusalem, but to wait for the Father’s promise. “This,” He said, “is what you heard from Me; for John baptized with water, but you will be baptized with the Holy Spirit not many days from now.”