1 verse has
“grave”
in Edition Clear Qur'an by Talal Itani / Al-Israa (The Night Journey)
17:31And do not kill your children for fear of poverty. We provide for them, and for you. Killing them is a grave sin.
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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