Shane Jones has warned Destiny Church leader Brian Tamaki to watch his mouth, after he referred to northern Māori MPs as "spuds".
Mr Jones, the regional economic development minister, said the self-styled bishop likened the MPs to rīwai (potatoes) in a church service at Waitangi's Te Tii marae.
He said Mr Tamaki had no standing in the north and should watch what he said.
He said the Destiny Church contingent was out of place at Waitangi and disturbed the wairua (spirit) with their bling, black leather, and noisy motorbikes.
A spokesperson for the church said Mr Tamaki would not comment on Mr Jones' comments.
"This is petty grandstanding and it is not part of his call to respond."