You are reading a tafsir for the group of verses 20:128 to 20:129
افلم يهد لهم كم اهلكنا قبلهم من القرون يمشون في مساكنهم ان في ذالك لايات لاولي النهى ١٢٨ ولولا كلمة سبقت من ربك لكان لزاما واجل مسمى ١٢٩
أَفَلَمْ يَهْدِ لَهُمْ كَمْ أَهْلَكْنَا قَبْلَهُم مِّنَ ٱلْقُرُونِ يَمْشُونَ فِى مَسَـٰكِنِهِمْ ۗ إِنَّ فِى ذَٰلِكَ لَـَٔايَـٰتٍۢ لِّأُو۟لِى ٱلنُّهَىٰ ١٢٨ وَلَوْلَا كَلِمَةٌۭ سَبَقَتْ مِن رَّبِّكَ لَكَانَ لِزَامًۭا وَأَجَلٌۭ مُّسَمًّۭى ١٢٩
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Commentary

The word ھُدٰی - (guidance) implied in the first sentence of verse 128 can refer either to the Qur'an or to the Holy Prophet ﷺ and the meaning would be, "Did not the Qur'an or the Holy Prophet ﷺ direct them i.e. the people of Makkah and tell them about the nations and the societies who were destroyed because they disobeyed the commands of Allah and turned away from the message brought to them by the Holy Prophet ﷺ ، and whose houses and lands are now occupied by them?" It is also possible that the word ھُدٰی (guidance) may refer to God in which case the meaning would be "Did God not direct."