3 verses have
“knew”
in Edition Clear Qur'an by Talal Itani / Al-Ankaboot (The Spider)
29:16And Abraham, when he said to his people, “Worship God, and fear Him. That is better for you, if you only knew.
29:41The likeness of those who take to themselves protectors other than God is that of the spider. It builds a house. But the most fragile of houses is the spider’s house. If they only knew.
29:64The life of this world is nothing but diversion and play, and the Home of the Hereafter is the Life, if they only knew.
Support Ayat Al Quran
Those who spend their wealth by night and day, privately and publicly, will receive their reward from their Lord. They have nothing to fear, nor shall they grieve.
The Holy Quran · Al-Baqara (The Cow) · 2:274