2 verses have
“duty”
in Edition Clear Qur'an by Talal Itani / Al-Maaida (The Table)
5:92Obey God and obey the Messenger, and be cautious. If you turn away—know that the duty of Our Messenger is clear communication.
5:99The Messenger’s sole duty is to convey. God knows what you reveal and what you conceal.
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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