Acts 2:4

Acts 2:4 (ASV)

4And they were all filled with the Holy Spirit, and began to speak with other tongues, as the Spirit gave them utterance.

Scripture Testimony Index stories for this passage

The Holy Spirit enabled the Motilone evangelists to speak and understand the language of the Yuko tribe, their former enemies. As a result, the Yuko tribe embraced new life in Jesus.
The deliverance of a demon possessed woman opened the way for the establishment of a church.
While at a conference in Brazil, Avis Goodheart is amazed to see Ana Mendez; a Mexican believer preach for two whole hours in perfect Portuguese; a language Ana previously knew nothing about. When asked how she did it, “Not with the mind, but through the spirit,” was her simple reply.
The Chinese underground church is experiencing great revival, which is resulting in a great missionary movement. Some are reported having had visions like Paul's Macedonian call (see Acts 16:9–10), in which they instantaneously started speaking the language of the nation calling them.