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

21:7We did not send before you except men, whom We inspired. Ask the people of knowledge, if you do not know.

21:17If We wanted amusement, We could have found it within Us, were We to do so.

21:22If there were in them gods other than God, they would have gone to ruin. So glory be to God, Lord of the Throne, beyond what they allege.

21:26And they say, “The Most Merciful has taken to himself a son.” Be He glorified; they are but honored servants.

21:36When those who disbelieve see you, they treat you only with ridicule: “Is this the one who mentions your gods?” And they reject the mention of the Merciful.

21:38And they say, “When will this promise come true, if you are truthful?”

21:39If those who disbelieve only knew, when they cannot keep the fire off their faces and off their backs, and they will not be helped.

21:42Say, “Who guards you against the Merciful by night and by day?” But they turn away from the mention of their Lord.

21:47We will set up the scales of justice for the Day of Resurrection, so that no soul will suffer the least injustice. And even if it be the weight of a mustard-seed, We will bring it up. Sufficient are We as Reckoners.

21:63He said, “But it was this biggest of them that did it. Ask them, if they can speak.”

21:68They said, “Burn him and support your gods, if you are going to act.”

21:72And We granted him Isaac and Jacob as a gift; and each We made righteous.

21:83And Job, when he cried out to his Lord: “Great harm has afflicted me, and you are the Most Merciful of the merciful.”

21:84So We answered him, lifted his suffering, and restored his family to him, and their like with them—a mercy from Us, and a reminder for the worshipers.

21:90So We answered him, and gave him John. And We cured his wife for him. They used to vie in doing righteous deeds, and used to call on Us in love and awe, and they used to humble themselves to Us.

21:109But if they turn away, say, “I have informed you sufficiently. Although I do not know whether what you are promised is near or far.”