2 verses have
“waver”
in Edition Clear Qur'an by Talal Itani / Aal-i-Imraan (The Family of Imraan)
3:139And do not waver, nor feel remorse. You are the superior ones, if you are believers.
3:146How many a prophet fought alongside him numerous godly people? They did not waver for what afflicted them in the cause of God, nor did they weaken, nor did they give in. God loves those who endure.
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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