A tribe in Papua New Guinea has been found singing "Shema Israel", and recorded on video.
This tribe was left a Bible some time ago in their language, but no missionary was there to guide them, so they just began to read it, line upon line.
As a result they accepted Yeshua in a born-again experience, got water baptised, and got filled with the Holy Spirit. They were never taught by anyone except the Lord!
Also they knew nothing about Christmas, or Easter, or the "Sabbath" on Sunday (as these are not mentioned in scripture,) but all the Biblical celebrations (Trumpets, Tabernacles, Passover, Pentecost - PLUS the Sabbath on the seventh day).
Their rendition of the "shema" is what every observant Jew declares daily.
See the link below to hear more of this fascinating story.