3 verses have
“pledge”
in Edition Clear Qur'an by Talal Itani / Al-Ahzaab (The Clans)
33:7Recall that We received a pledge from the prophets, and from you, and from Noah, and Abraham, and Moses, and Jesus son of Mary. We received from them a solemn pledge.
33:15Although they had made a pledged to God, in the past, that they will not turn their backs. A pledge to God is a responsibility.
33:23Of the believers are men who are true to what they pledged to God. Some of them have fulfilled their vows; and some are still waiting, and never wavering.
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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