تَعْلَمْ
Appears 4 times in the Quran.
(Root: علم)
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2:106 مَا نَنسَخْ مِنْ ءَايَةٍ أَوْ نُنسِهَا نَأْتِ بِخَيْرٍ مِّنْهَآ أَوْ مِثْلِهَآ أَلَمْ تَعْلَمْ أَنَّ ٱللَّهَ عَلَىٰ كُلِّ شَىْءٍ قَدِيرٌ
Whatever communications We abrogate or cause to be forgotten, We bring one better than it or like it. Do you not know that Allah has power over all things?
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2:107 أَلَمْ تَعْلَمْ أَنَّ ٱللَّهَ لَهُۥ مُلْكُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ وَمَا لَكُم مِّن دُونِ ٱللَّهِ مِن وَلِىٍّ وَلَا نَصِيرٍ
Do you not know that Allah's is the kingdom of the heavens and the earth, and that besides Allah you have no guardian or helper?
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5:40 أَلَمْ تَعْلَمْ أَنَّ ٱللَّهَ لَهُۥ مُلْكُ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ يُعَذِّبُ مَن يَشَآءُ وَيَغْفِرُ لِمَن يَشَآءُ وَٱللَّهُ عَلَىٰ كُلِّ شَىْءٍ قَدِيرٌ
Do you not know that Allah-- His is the kingdom of the heavens and the earth; He chastises whom He pleases; and forgives whom He pleases and Allah has power over all things.
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22:70 أَلَمْ تَعْلَمْ أَنَّ ٱللَّهَ يَعْلَمُ مَا فِى ٱلسَّمَآءِ وَٱلْأَرْضِ إِنَّ ذَٰلِكَ فِى كِتَٰبٍ إِنَّ ذَٰلِكَ عَلَى ٱللَّهِ يَسِيرٌ
Do you not know that Allah knows what is in the heaven and the earth? Surely this is in a book; surely this is easy to Allah.