Acts 1:2-4 Amplified Bible, Classic Edition (AMPC)
2 Until the day when He ascended, after He through the Holy Spirit had instructed and commanded the apostles (special messengers) whom He had chosen.
3 To them also He showed Himself alive after His passion (His suffering in the garden and on the cross) by [a series of] many convincing demonstrations [unquestionable evidences and infallible proofs], appearing to them during forty days and talking [to them] about the things of the kingdom of God.
4 And while being in their company and eating with them, He commanded them not to leave Jerusalem but to wait for what the Father had promised, Of which [He said] you have heard Me speak.
Acts 1:2-4 New International Version (NIV)
2 until the day he was taken up to heaven, after giving instructions through the Holy Spirit to the apostles he had chosen. 3 After his suffering, he presented himself to them and gave many convincing proofs that he was alive. He appeared to them over a period of forty days and spoke about the kingdom of God. 4 On one occasion, while he was eating with them, he gave them this command: “Do not leave Jerusalem, but wait for the gift my Father promised, which you have heard me speak about.