Nobody on the face of the Earth can quote any verse in the Bible that says, "The Earth is flat."
Notice how the expression "face of the Earth" is not literal? The Earth does not have a face. I use a figure of speech.
Likewise, when the Bible speaks of the Earth having 'pillars' and 'foundations', those are figures of speech as any basic course in literary comprehension will show.
The idea that the Earth is flat was discounted once Aristotle presented evidence for a spherical Earth in 330 BC, observing that southbound travellers see southern stars rising higher above the horizon. He also pointed out that the shadow of Earth on the Moon is always circular, and that only a spherical Earth could cast a circular shadow at all lunar phases. In 240 BC, Eratosthenes even calculated the Earth’s spherical circumference. In his treatise 'The reckoning of time', the venerable Bede (c.672 – 735) explained the varying duration of daylight in terms of ‘the roundness of the Earth’, and continues, ‘for not without reason is it called “the orb of the world” on the pages of Holy Scripture and of ordinary literature. It is, in fact, set like a sphere in the middle of the whole universe.’ And anything Bede wrote was required reading for the priests of his day.
It is true that mediaeval scholars allegedly reverted to flat-Earth beliefs, but Jeffrey Russell (professor of history at University of California, Santa Barbara) argues in his book 'Inventing The Flat Earth: Columbus and modern historians', that the flat-Earth theory is little more than a fable used to denigrate pre-modern European civilization.