.
Portugal was leader of the Skulen Hasidic dynasty founded by his father, and was known for denying himself a bed to sleep in or more than one meal a day.
He also battled against modern perils such as the internet and reputedly set fire to a television set each year on the eve of Passover.
One of the last surviving remnants of the pre-Holocaust generation - a leader that was deeply respected by all.
Assembly Member Simcha Eichenstein The rabbi, known as the Skulener Rebbe, was born in 1924 in what is now Moldova and followed his father and grandfather into religious study.
The family moved to the Ukraine to escape the Nazis, then returned to Bucharest in Romania - where the Communist regime reportedly jailed the father and son for teaching Torah and helping Jewish children.
UN officials helped them flee to the US in 1960.
Rabbi Yisroel Avrohom took over as head of the dynasty after his father Eliezer Zusia Portugal's death in 1982.
He died aged 95 on Monday surrounded by family at Johns Hopkins hospital in Baltimore.
The need to transport his body to Brooklyn meant the funeral could not take place the same day, as is the custom.
Assembly Member Simcha Eichenstein said: "As a community we mourn the petira of the Skulener Rebbe zatzal, one of the last surviving remnants of the pre-Holocaust generation - a leader that was deeply respected by all.
"Rabbi Portugal was a truly inspiring and special individual that we should all aspire to be like."
He had five sons who are all rabbis and three daughters who married rabbis.
It is understood eldest son Yeshaya Yaakov Portugal will succeed him as leader.
Rabbi Yisroel Avrohom Portugal, who has died aged 95, was known for his hatred of the internet and television
Enormous crowds packed into Boro Park in Brooklyn yesterday Credit: Todd Maisel New York Police struggled to hold back the vast crowds Credit: Todd Maisel Mourners surged against barriers to get closer Credit: Todd Maisel People also hung off balconies and peered through windows Credit: Getty Images It was thought to be one of the biggest ever funerals in New York Credit: Getty Images A boy climbed a signpost to take a snap - but not with a phone Credit: Todd Maisel Police help a young man stuck in the crowd Credit: Todd Maisel Mourners came from far afield to show their respects Credit: Getty Images The rabbi was a revered figure in the Hasidic community Credit: Todd Maisel We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368 . You can WhatsApp us on 07810 791 502. We pay for videos too. Click here to upload yours.