The little-known Moussa, who challenged Sisi, is the head of Egypt's El-Ghad party who registered immediately before the close date for applications.
The opposition is not likely to accept Moussa's leadership, having called for a boycott of these elections that they called a "masquerade".
"The voice of the masses of Egyptians will remain a witness - no doubt - that the will of our nation is prevailing with a force that does not know weakness", Sisi said.
Al-Sisi had deposed the country's first democratically elected President Mohamed Morsi, in 2013, in his capacity as defense minister.
Mr Sisi needed a high turnout and a resounding win to lend legitimacy to the three-day election.
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But Bender later said that was a joke on Twitter, saying he wouldn't let his son go because "he is failing math". He added , "I'm sorry that NRATV did that". " Plot, plan, strategize, organize, and mobilize ".
State media said Mr Sisi had secured a landslide victory against his sole challenger, Moussa Mustafa Moussa, winning more than 90% of the vote, according to the BBC.
The Spokesman of the National Electoral Commission Mahmoud al-Sherif announced an immediate fine worth of EGP 500 for those who are eligible to vote, yet haven't participated in the 2018 presidential elections.
According to Al Ahram, in addition to 23 million who cast valid votes, two million spoiled their ballot papers.
The voter turnout in the 2014 presidential polls, which Sisi won by almost 97 percent of votes against leftist politician Hamdeen Sabahi, was about 47.5 percent of some 53.8 million registered voters.
There were also reports that some people were offered incentives of money and food to cast their ballots, or promised improved public services. She said: "The evidence is that all the Egyptian people, including big numbers of youths and elderly, have come out to vote".