Indian death row prisoner Sarabjit Singh's lawyer will file a fresh mercy petition before Pakistan President Asif Ali Zardari on Wednesday in the wake of the Supreme Court dismissing his appeal against the capital punishment.

Owais Sheikh, the new counsel for Sarabjit, said the petition seeking clemency for the Indian national will include a letter addressed to Zardari by the condemned man. "I will file the mercy petition on Wednesday. I have also sought a meeting with the President so I can take up the matter with him personally," Sheikh said, shortly after meeting Sarabjit at Kot Lakhpat jail here.

Sheikh said the petition will include a letter from Sarabjit in which he has asked the President to pardon him on humanitarian grounds so that he could live the rest of his life with his family in India.

Noting that he had already spent nearly 19 years in prison, Sarabjit said in the letter that Islam taught its followers to forgive instead of taking revenge. Sheikh said Sarabjit had called on Prime Minister Manmohan Singh to take up his case with the Pakistan government. Sarabjit also urged the Indian government to treat all Pakistani prisoners in a humane manner and free them expeditiously, he added.