2 verses have
“understand”
in Edition Clear Qur'an by Talal Itani / Hud (Hud)
11:51“O my people, I ask you no wage for it; my wage lies with Him who originated me. Do you not understand?”
11:91They said, “O Shuaib, we do not understand much of what you say, and we see that you are weak among us. Were it not for your tribe, we would have stoned you. You are of no value to us.”
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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