What is the second petition?

Thy kingdom come. That is: So rule us by Thy Word and Spirit that more and more we submit to Thee. Preserve and increase Thy church. Destroy the works of the devil, every power that raises itself against Thee, and every conspiracy against Thy holy Word. Do all this until the fulness of Thy kingdom comes, wherein Thou shalt be all in all.

Proofs

• Thy kingdom come. That is: So rule us by Thy Word and Spirit that more and more we submit to Thee. (Psalm 119:5; Psalm 119:105; Psalm 143:10; Matthew 6:33)
• Preserve and increase Thy church. (Psalm 51:18; Psalm 122:6–9; Matthew 16:18; Acts 2:42–47)
• Destroy the works of the devil, every power that raises itself against Thee, and every conspiracy against Thy holy Word. (Romans 16:20; 1 John 3:8)
• Do all this until the fulness of Thy kingdom comes, wherein Thou shalt be all in all. (Romans 8:22–23; 1 Corinthians 15:28; Revelation 22:17; Revelation 22:20)