Acts 1:6-10

So, when they had come together, they began asking Him, saying, “Lord, is it at this time that You are restoring the kingdom to Israel?”

But He said to them, “It is not for you to know periods of time or appointed times which the Father has set by His own authority;

but you will receive power when the Holy Spirit has come upon you; and you shall be My witnesses both in Jerusalem and in all Judea, and Samaria, and as far as the remotest part of the earth.” The Ascension

And after He had said these things, He was lifted up while they were watching, and a cloud took Him up, out of their sight.

And as they were gazing intently into the sky while He was going, then behold, two men in white clothing stood beside them,