The British sportsman who won a bronze medal at the Rio Olympics has recently turned professional and is tipped for the top.
He invited YouTube channel IFL TV to film inside his changing room before his second fight of his career over the weekend.
The clip shows Buatsi in a circle singing how grateful he is for what God has done for him.
He then invites an uncle to pray.
Speaking after his fight with Italy's Baptiste Castegnaro, which he won by knock out, he said: "Sometimes we forget to we need to thank God.
"We do the hard work but it's favour from God, mercy from God.
"If he were to judge us for the way we live - no one would stand. So I'm grateful.
Buatsi is being managed by world heavyweight champion Anthony Joshua's team and is expected to move on to big things.