Deputy Prime Minister Ahmad Zahid Hamidi today told his predecessor Muhyiddin Yassin to prove that Prime Minister Najib Razak had close to RM1 billion in his personal bank account even before the purported RM2.6 billion 'Arab donation' came in.

"Ask him to produce the evidence if he has it," he said at a press conference in Putrajaya.

"He accused our prime minister, he must show the evidence. Don't make allegations based on hearsay," he responded curtly.

In total, Muhyiddin, claimed there was almost RM4 billion in Najib's personal bank acounts.