Ateeq ur Rehman who heads the all Karachi traders association said majority of the markets and shopping centres were closed as a mark of respect for Edhi.
"Hundreds of people including some politicians and celebrities have shown up on Sunday for the soyem", his son, Faisal Edhi said.
Edhi's funeral prayers will be offered today, after which he will be laid to rest at the Edhi village he founded 25 years ago. He was renowned for dedicating his life to the poor, founding the Edhi Foundation, which grew to be Pakistan's largest welfare organisation, running schools, hospitals and ambulance services across the country.
Prime Minister Narendra Modi had also announced a contribution of 1 crore rupees to the Edhi foundation last October but Abdul Sattar Edhi denied the charity.
Edhi, who was 88 years old, had been suffering from complications related to a kidney failure, for which he had been undergoing treatment at SIUT since 2013.
In June, Edhi declined an offer by former president Asif Ali Zardari for treatment overseas, insisting on getting it done in Pakistan, particularly in a government hospital. She was then adopted by Edhi Foundation.
Geeta, who is now staying at Indore Dead Bilingual Academy (IDBA), an NGO for the speech and hearing impaired, recalled her association with Edhi and expressed her desire to interact with his family members.
In June, former president Asif Ali Zardari had offered to send Edhi overseas for treatment but the philanthropist refused saying he prefers to be treated at a government hospital in Pakistan.
Despite constant threats, the Edhi Foundation "became Pakistan's most relied upon social safety net, handling numerous responsibilities that the Pakistani government could not, or would not, tackle", Al Jazeera's Brandice Alexander reported.
Prominent Pakistani Christian leader and Former Federal Minister Julius Salik expressed deep sorrow over loss of legendary philanthropist Adbul Sattar Edhi.
Edhi came from humble origins and remained a quiet and modest man all his life, which in part was what inspired the nationwide love for him among Pakistanis.
Edhi has been nominated several times for the Nobel Peace Prize, and appears on the list again this year - nominated by teenage Nobel laureate Malala Yousafzai.