13 verses have
if
in Edition Clear Qur'an by Talal Itani / Faatir (The Originator)

35:2Whatever mercy God unfolds for the people, none can withhold it. And if He withholds it, none can release it thereafter. He is the Exalted in Power, Full of Wisdom.

35:4If they reject you, messengers before you were also rejected. To God all matters are returned.

35:5O people! The promise of God is true; so let not the lowly life seduce you, and let not the Tempter tempt you away from God.

35:11God created you from dust, then from a small drop; then He made you pairs. No female conceives, or delivers, except with His knowledge. No living thing advances in years, or its life is shortened, except it be in a Record. That is surely easy for God.

35:14If you pray to them, they cannot hear your prayer. And even if they heard, they would not answer you. And on the Day of Resurrection, they will reject your partnership. None informs you like an Expert.

35:16If He wills, He can do away with you, and produce a new creation.

35:17And that would not be difficult for God.

35:18No burdened soul can carry the burden of another. Even if one weighted down calls for help with its burden, nothing can be lifted from it, even if they were related. You are to warn those who fear their Lord inwardly, and perform the prayer. He who purifies himself purifies himself for his own good. To God is the ultimate return.

35:25If they disbelieve you, those before them also disbelieved. Their messengers came to them with the clear proofs, with the Psalms, and with the Enlightening Scripture.

35:34And they will say, “Praise God, who has lifted all sorrow from us. Our Lord is Most Forgiving, Most Appreciative.

35:37And they will scream therein, “Our Lord, let us out, and we will act righteously, differently from the way we used to act.” Did We not give you a life long enough, in which anyone who wanted to understand would have understood? And the warner did come to you. So taste. The evildoers will have no helper.

35:42And they swore by God with their solemn oaths, that if a warner came to them, they would be more guided than any other people. Yet when a warner came to them, it only increased them in aversion.

35:45If God were to punish the people for what they have earned, He would not leave a single living creature on its surface. But He defers them until a stated time. Then, when their time has arrived—God is Observant of His creatures.