Acts 1

8 But you will receive power when the Holy Spirit has come upon you; and you will be witnesses to me*A very small minority of Greek manuscripts (perhaps 2%), of inferior quality, read ‘my witnesses’ instead of ‘witnesses to me’. To my mind, at least, there is a significant difference in meaning—to be a witness to Jesus involves being like Him (Matthew 10:25) and doing like Him (John 14:12).—both in Jerusalem, and all Judea and Samaria, and even to the last part of the earth."*There is a strategy here: ‘both…and…and’ = simultaneously. If you stay in your ‘Jerusalem’ until you win everyone, you will never get to the world (there are many people who do not want God, period, so they will never be won). ‘Judea’ and ‘Samaria’ are treated as a unit, grammatically, so we have our town, our country and the world. "Last" is an adjective used as a noun, so we must supply ‘part’ or ‘place’, or else render ‘end’; note that the word is singular. I take it that no part of the world is to be left unreached.