A former governor of the state, Olagunsoye Oyinlola and Patricia Etteh, a former speaker of the House of Representatives also attended the prayer session.
Adeleke, a former governor of the state, died on April 23 at the age of 62.
The Fidau prayer was held in Ede, Osun State.
According to NAN, a former governor of the state, Olagunsoye Oyinlola and Patricia Etteh, a former speaker of the House of Representatives also attended the event.
Others were Adebayo Alao-Akala, a former governor of Oyo State; the Deputy Governor of Osun, Titilaoye Tomori, and the Osun State Chairman of the All Progressives Congress, APC, Gbenga Famodun.
Also present at the ceremony were APC chieftains as well as friends, relatives, and political associates of the deceased.
The Chief Imam of Offa, Sheik Suleiman, admonished politicians and all to imbibe the good deeds of the late senator.
He said the contributions of the late senator to the development of the state would not be forgotten.
Suleiman also called on the people of the state to use the prayer as an avenue to readjust their ways and live up to the expectations of the masses.
He noted that death is inevitable, urged those at the event to reflect on their lifestyles.
Also, Moshood Adeoti, the Secretary to the Government of the State of Osun who spoke on behalf of the government, described the late senator as an icon in the state whose landmark achievements would forever be remembered.
Adeoti said Adeleke's painful exit was a shock to the state and the country.
Adeleke was a senator representing Osun West Senatorial District under the platform of the APC.
He was also the first civilian governor of Osun between January 1992 and November 1993 on the platform of defunct Social Democratic Party.