"After all, Tun Mahathir was given 22 years to administer Malaysia and he did an excellent job despite criticisms against his administration then, Please give Najib the time to prove his worth. Don't interfere prematurely," he said in a statement Tuesday.
Masing said the strength of any political organisation depends on its solidarity and its members to stay together.
"Criticism within by its members are acceptable only if they are meant to strengthen the party and not to topple its leaders," he added, stating that Umno was no exception to the rule.
"The Prime Minister has asked the relevant agencies to do an audit on it. Let them do their work," he added