Shortly after he returned he met with some state governors and top government officials led by Vice-President Yemi Osinbajo at the First Lady Conference Hall, Buhari retired into his official residence.
A security source said but for a few family members and close friends, Buhari has not been receiving visitors since he returned on Friday.
The President had shortly after returning to the country urged those who might be considering sending delegations to welcome him to stay back and continue to pray for the country.
His Special Adviser on Media and Publicity, Mr. Femi Adesina, had said the President would on Monday transmit a letter to the National Assembly formally informing the federal lawmakers of his return from vacation.
Meanwhile, as Buhari formally resumes work on Monday, expectations are high that decisions would be taken on some national issues in the course of the week.
One of such issues, our correspondent learnt, is the posting of the nation’s career ambassadors-designate. Read in full