2 verses have
duty
in Edition Clear Qur'an by Talal Itani / Az-Zumar (The Groups)

39:10Say, “O My devotees who have believed, keep your duty to your Lord. For those who do good in this world, is goodness. And God’s earth is vast. The steadfast will be paid their wages in full, without reckoning.”

39:56So that a soul may not say, “How sorry I am, for having neglected my duty to God, and for having been of the scoffers.”