Dr Mahathir Mohamad has denied that he attacked Prime Minister Najib Abdul Razak's wife Rosmah Mansor in one of his blog postings.

The former premier said he was only questioning her lavish lifestyle.

"There are rumours out there that she spent RM3 million just for flower decorations for the (daughter’s wedding).

"The problem is orang cerita (people talk). I do not know if it is factual, but I think there are some facts (could be true).

" Itu jadi masalah (that is the problem)," he added.

Mahathir also pointed out that the prime minister's income was not high.

RM20,000 a month sufficient

During his time, the former premier said he was paid RM20,000 a month and this was sufficient for him and his family.

"It was enough for me to have a plate of mee (noodles) not many plates of mee," he quipped.

He emphasised the need for leaders to live moderately.

Mahathir was speaking to reporters after delivering a talk on youth and nation building at the German-Malaysian Institute in Kajang today.

Also present was his wife Dr Siti Hasmah Mohd Ali.

On April 20, the former premier had mentioned Najib and Rosmah's extravagant lifestyle in his blog.

He has been demanding for Najib’s resignation, claiming that the latter would cause Umno and BN’s defeat in the next national polls.

Mahathir had previously described Nooryana Najwa Najib's wedding as the "wedding of the century" and not the wedding of the year.

The wedding receptions were held at the Kuala Lumpur Convention, Putra World Trade Centre, Najib's constituency of Pekan, Pahang and in Almaty, Kazakhstan.