Malaysia’s former Prime Minister Mahathir Mohamad is in stable health after receiving treatment at the National Heart Institute, according to his daughter, who issued a statement on Saturday.

Marina Mahathir said that her 96-year-old father had been readmitted to the hospital and had had two days of therapy following an elective medical operation in early January.

“Siti Hasmah Mohd Ali (his wife) and family want that everyone pray for his quick and complete recovery,” Marina stated.

A representative for Mahathir previously stated that he was taken to the hospital’s heart care unit but provided no further details.

Mahathir, who is still an active lawmaker, had been discharged from hospital after what was described as an successful elective medical procedure on Jan.8.

The National Heart Institute did not say at the time what procedure Mahathir, who has a history of heart problems, had undergone.

In December, he was admitted and discharged after his doctors said they were satisfied with the results of necessary investigations.