This is, primarily, a way to say, "Brethren, wont you join me in prayer?"
As believers in Christ, we are not called to be in isolation from fellow believers; we come together as family in many things - including prayer. In Acts 12:1-16 we see that believers had come together to pray for one of their brethren: "So Peter was kept in the prison, but prayer for him was being made fervently by the church to God" [Acts 12:5]. By God, Peter's chains fell off and he was led out of prison, but Peter thought he was seeing a vision; however, "when he realized this, he went to the house of Mary, the mother of John who was also called Mark, where many were gathered together and were praying" [Acts 12:12]. Wow! What a testament to Isaiah 65:24, "It will also come to pass that before they call, I will answer; and while they are still speaking, I will hear."
Let us join you in coming before God in prayer!