Ramaphosa said he would defend the Sarb and ensure it maintained its reputation in the international markets.
ANC leaders came out against each other this week after secretary-general Ace Magashule said the national executive committee lekgotla had agreed to extend the mandate of the bank to include growth and employment.
But he was contradicted by Finance Minister Tito Mboweni and ANC head of economic transformation Enoch Godongwana, who said there was no such decision.
Political parties in Parliament said yesterday Ramaphosa must use the State of the Nation Address on Thursday to clarify the role and mandate of the Sarb. They said it would not make sense for Ramaphosa to talk about other issues in the address, and not touch on such a sensitive and important matter.