Good morning! Acts 2:1 "When the Day of Pentecost had fully come, they were all with one accord in one place."
In this verse we see the first biblical act of the New Testament Church, and we also see that it didn't happen until they wer all unified. In the previous chapter Jesus commanded them to stay where they were (Jerusalem), and wait for the Promise (Holy Spirit) from God to be sent. After receiving the command to stay put and wait, the bible says they prayed and asked God in unity to fulfill the promise.
Likewise, when we're desiring God to fulfill a promise or move in our life, we must live in unity with His commands. Just as the 120 were in unity with what Jesus commanded, we must also. And just as they experienced the fulfillment of the promise, we can and will, but we MUST be in place, patiently waiting, and in unity with what God has commanded and promised.