Assistant Speaker Trevor Mallard is objecting to the proposed new prayer for Parliament, saying while it removes religious elements from the English version, it deceptively puts them into the Maori version.
It also appeared to confer rights of Parliament's sovereignty on the local iwi, Te Atiawa.
Speaker David Carter appears to have consulted only MPs and perhaps a handful of others about changing the prayer. He won't discuss it before making the decision next week.
The prayer is said daily at the start of Parliament and has long been criticised because it is non-secular and has references to Christianity.
Mr Mallard said he was not criticising Mr Carter, but added: "The whole thing smells of consulting one or two people."