The suspension of the former CJN has sparked outrage, with critics of the Buhari administration describing it as anti-democratic.
In separate statements, the US, UK and EU said the action could have effect on the general election.
The criticisms were still pouring in as of the time this report was filed.
At the occasion, Muhammad said the judiciary “is in trying times”, asking members of the bar and bench to stand, protect and “uphold the integrity of this arm of government”.
“I encourage you to uphold and enhance the honour and standing of the judiciary and I pray that the Almighty God will bestow upon you strength, good health and wisdom in the performance of your duties,” he said.