15 verses have
say
in Edition Clear Qur'an by Talal Itani / Al-Kahf (The Cave)

18:4And to warn those who say, “God has begotten a son.”

18:5They have no knowledge of this, nor did their forefathers. Grave is the word that comes out of their mouths. They say nothing but a lie.

18:22They will say, “Three, and their fourth being their dog.” And they will say, “Five, and their sixth being their dog,” guessing at the unknown. And they will say, “Seven, and their eighth being their dog.” Say, “My Lord knows best their number.” None knows them except a few. So do not argue concerning them except with an obvious argument, and do not consult any of them about them.

18:23And never say about anything, “I will do that tomorrow.”

18:24Without saying, “If God wills.” And remember your Lord if you forget, and say, “Perhaps my Lord will guide me to nearer than this in integrity.”

18:26Say, “God knows best how long they stayed.” His is the mystery of the heavens and the earth. By Him you see and hear. They have no guardian apart from Him, and He shares His Sovereignty with no one.

18:29And say, “The truth is from your Lord. Whoever wills—let him believe. And whoever wills—let him disbelieve”. We have prepared for the unjust a Fire, whose curtains will hem them in. And when they cry for relief, they will be relieved with water like molten brass, which scalds the faces. What a miserable drink, and what a terrible place.

18:39When you entered your garden, why did you not say, “As God wills; there is no power except through God”? Although you see me inferior to you in wealth and children.

18:42And ruin closed in on his crops, and so he began wringing his hands over what he had invested in it, as it lays fallen upon its trellises. And he was saying, “I wish I never associated anyone with my Lord.”

18:49And the book will be placed, and you will see the sinners fearful of its contents. And they will say, “Woe to us! What is with this book that leaves nothing, small or big, but it has enumerated it?” They will find everything they had done present. Your Lord does not wrong anyone.

18:52On the Day when He will say, “Call on My partners whom you have claimed.” They will call on them, but they will not answer them. And We will place between them a barrier.

18:83And they ask you about Zul-Qarnain. Say, “I will tell you something about him.”

18:103Say, “Shall We inform you of the greatest losers in their works?”

18:109Say, “If the ocean were ink for the words of my Lord, the ocean would run out, before the words of my Lord run out,” even if We were to bring the like of it in addition to it.

18:110Say, “I am only a human being like you, being inspired that your god is One God. Whoever hopes to meet his Lord, let him work righteousness, and never associate anyone with the service of his Lord.”