Buhari said he purposely returned so he could rest while Osinbajo would continue running the affairs of State.
He said “I think one of the terrible things you can have is self drug administration.
“I could not recall being so sick since I was a young man, including the military with its ups and downs.
“I found out that technology is developing so fast that if you have a lot of confidence you better keep it because you need it.
“Blood transfusions, going to the laboratories, and so on and so forth, but I am very pleased that we; when I say we, I mean the government and the people, all over are trying to keep up with technology."
President Buhari also said the only way he can repay Nigerians for their prayers is for him to rededicate himself to serving them, protecting their interests and keeping their trust.
Buhari, who made his feelings known at a brief reception organised in his honour at the Presidential Villa, Abuja on Friday, expressed gratitude to all Nigerians – Muslims and Christians alike.
According to him, the constant and persistent prayers offered by Nigerians over his health condition, testifies to their love for him and the country.
“I am deeply grateful to all Nigerians – Muslims and Christians alike, who have prayed and continued to pray for my good health.
“This is a testimony that in spite of the hardship being experienced by Nigerians, they have continued to support the government in its efforts to tackle our country’s challenges.
“The best way for me to pay you all is to rededicate myself to serving you, protecting your interests, and keeping your trust.
“I thank you very much. I feel much better now," he said.
The President revealed that he might go back to London in a few weeks for a follow-up to his routine medical check-up.
He appealed to Nigerians stay where they are and continue to pray for the country’s unity, progress and prosperity “rather than sending delegations to Abuja to welcome me’
"There may, however, be need to have further follow-ups within some weeks.
“Rather than sending delegations to Abuja to welcome me, may I appeal to our people to continue to pray for the country’s unity, progress and prosperity.
“I thank you very much and may God bless our country.’’
President Buhari stated that he purposely returned on Friday so he could rest while acting President Yemi Osinbajo would continue.
In his remarks, the acting President thanked Buhari for respecting the constitution and entrusting him with power before travelling.
Osinbajo said it was a tough job ‘‘going around in borrowed robes’’.
Speaking at the event, the Minister of Information and Culture, Alhaji Lai Mohammed, thanked God for the safe return of the President, saying, “today is a day of joy for Nigerians, Africa and the world as the President arrived safely”.
The Chairman of Nigeria’s Governors Forum, Abdulaziz Yari and the Chief of Defence Staff, Abayomi Gabriel Olonishakin, also delivered addresses of welcome for the President.
Osinbajo, Yari, Gov. Yahaya Bello of Kogi, Gov. Abdullahi Ganduje of Kano and the Chief of Staff to the President, Abba Kyari were among the top officials, who received the President o arrival at the helipad.
Others are the Director-General of the Department of State Services, Lawal Daura; National Security Adviser, Babagana Monguno; and the Director-General, NIA.
The Permanent Secretary, State House, Jalal Arabi; Minister of Defence, Mansur Dan-Ali; the Service Chiefs led by the Chief of Defence Staff, Gabriel Olonishaki; and the Inspector General of Police (IGP), Ibrahim Idris were also at the helipad to receive Buhari.