The same thread (this verse)Acts 4:29-31

The prayed-for boldness compounds over decades: the word of God grew and multiplied.

“Now, Lord, look at their threats, and grant to your servants to speak your word with all boldness, while you stretch out your hand to heal; and that signs and wonders may be done through the name of your holy Servant Jesus.” When they had prayed, the place was shaken where they were gathered together. They were all filled with the Holy Spirit, and they spoke the word of God with boldness.”

In parallel with (this verse)2 Thessalonians 3:1

What running swiftly looks like in history: the word of God grew and multiplied.

“Finally, brothers, pray for us, that the word of the Lord may spread rapidly and be glorified, even as also with you;”