Earlier this month, Maanyata was admitted to a private hospital in suburban Mumbai after being diagnosed with a tumour in liver and a suspected heart ailment.
Dutt, who is under emotional distress because of his wife's ill-health, recently visited Shree Siddhivinayak Ganapati Mandir in Dadar and the holy Sayyed Haji Abdul Rehman Shah Baba Dargah in Dongri to pray for her recovery.
On December 21, the 53-year-old Bollywood actor and 1993 Mumbai serial blasts case convict was granted a month's leave from Yerwada Jail in Pune after he filed an application citing his wife's illness.
Earlier this week, the Maharashtra government extended his parole by another 30 days on the ground of his wife's illness.
"My wife has a tumour of the liver. There have been many cancer instances in my family. Doctors are investigating. Please pray for my wife. We will follow medical course after the investigation," Dutt had said earlier.
Dutt had been convicted by the Supreme Court last year and sentenced to five years in prison for illegally possession of arms in a case related to the 1993 bomb blasts.
He had already served 18 months of his term and is currently undergoing the remaining 42 months of his sentence.