Dr. Mustafa Khattab, the Clear Quran - Surah Taha, ayah 129

Translation of Surah Taha, ayah 129 (20:129)

وَلَوۡلَا كَلِمَةٞ سَبَقَتۡ مِن رَّبِّكَ لَكَانَ لِزَامٗا وَأَجَلٞ مُّسَمّٗى ١٢٩
Had it not been for a prior decree from your Lord1 ˹O Prophet˺ and a term already set, their ˹instant˺ doom would have been inevitable.

Foot notes

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That He will delay their judgment until the Hereafter.