Nahj al-Balāgha

قال الشريف : الدّعْقُ: الدّقُّ، أي: تَدُقُّ الخُيُولُ بِحَوَافِرِهَا أرْضَهُمْ. نَوَاحِرُ أَرْضِهِمْ: مُتَقَابِلاَتُهَا، يُقَالُ: مَنَازِلُ بَنِي فُلان تتَنَاحَرُ، أيْ: تَتَقَابَلُ.

as-Sayyid ar-Raḍī says : “ad-da‘q” means trampling, e.g., “taduqqu’l-khuyūlu biḥawāfirihā ardahum” (the horses trample the ground with their hoofs). “nawāḥini arḍihim” means lands opposite each other, it is said, “manāzilu banī fulānin tatanāḥaru” meaning the ‘houses of so-and-so are opposite each other.’