https://en.wikipedia.org/wiki/Brahm%C4%81_(Buddhism)
https://en.wikipedia.org/wiki/Brahman
Notice the commonality, though the stories are not the same.
“while participating in a Buddhist ceremony “
How exactly did he participate?
Christians might be able to attend such a ceremony, or join in a wedding celebration, etc.,
but there are limits (ie, burning incense to an idol, for example).