وَالتَّأْكِيدُ عَلَى قِسْمَيْنِ: لَفْظِيٌّ، وَهُوَ تَكْرِيرُ اللَّفْظِ الْأَوَّلِ، نَحْوُ: «جَاءَنِي زَيْدٌ زَيْدٌ، وَجَاءَ جَاءَ زَيْدٌ».
Translation: There are two kinds. The first is verbal emphasis: repeating the earlier expression, as in “Zayd, Zayd came to me” or “Came, came Zayd.”
The book repeats a noun in the first example and a verb in the second. Mere mention of two different words is not verbal emphasis.