2 verses have
“understand”
in Edition Clear Qur'an by Talal Itani / Al-Ankaboot (The Spider)
29:35And We left behind a clear trace of it, for people who understand.
29:63And if you asked them, “Who sends water down from the sky, with which He revives the earth after it had died?” They would say, “God.” Say, “Praise be to God.” But most of them do not understand.
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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