5 verses have
sign
in Edition Clear Qur'an by Talal Itani / Al-Anbiyaa (The Prophets)

21:5And they said, “A jumble of dreams,” and, “He made it up,” and, “He is a poet,” “let him bring us a sign, like those sent to the ancients.”

21:31And We placed on earth stabilizers, lest it sways with them, and We placed therein signposts and passages, that they may be guided.

21:37The human being was created of haste. I will show you My signs, so do not seek to rush Me.

21:77And We supported him against the people who rejected Our signs. They were an evil people, so We drowned them all.

21:91And she who guarded her virginity. We breathed into her of Our spirit, and made her and her son a sign to the world.