1 verse has
“steadfast”
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.”
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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