Luke 24:48

⁴⁶ And He told them, “This is what is written: The Christ will suffer and rise from the dead on the third day,

⁴⁷ and in His name repentance and forgiveness of sins will be proclaimed to all nations, beginning in Jerusalem.

You are witnesses of these things.

⁴⁹ And behold, I am sending the promise of My Father upon you. But remain in the city until you have been clothed with power from on high.”

⁵⁰ When Jesus had led them out as far as Bethany, He lifted up His hands and blessed them.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

Acts 13:31
and for many days He was seen by those who had accompanied Him from Galilee to Jerusalem. They are now His witnesses to our people.
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Acts 2:32
God has raised this Jesus to life, to which we are all witnesses.
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Acts 1:8
But you will receive power when the Holy Spirit comes upon you, and you will be My witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.”
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Acts 5:32
We are witnesses of these things, and so is the Holy Spirit, whom God has given to those who obey Him.”
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Acts 10:41
not by all the people, but by the witnesses God had chosen beforehand, by us who ate and drank with Him after He rose from the dead.
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Acts 1:22
beginning from John’s baptism until the day Jesus was taken up from us. For one of these must become a witness with us of His resurrection.”
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Acts 3:15
You killed the Author of life, but God raised Him from the dead, and we are witnesses of the fact.
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Acts 10:39
We are witnesses of all that He did, both in the land of the Jews and in Jerusalem. And although they put Him to death by hanging Him on a tree,
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