Aḥad (أحد) – Indivisible

Allah is Aḥad (أحد) – Indivisible

قُلْ هُوَ اللَّهُ أَحَدٌ {1}

Say: ‘Howa (He is) Allah, the indivisible [112:1][1] 

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[1] See for example: https://hubeali.com/category/quran-tafseer/al-tawheed-chapter-112/