وَتَخْشَى النَّاسَ وَاللَّهُ أَحَقُّ أَنْ تَخْشَاهُ
You fear people, whereas God is more deserving that you should fear Him.
The opening “takhshā” and the later “takhshāhu” use the same verbal root to complete a contrast between fearing people and recognizing that God is more deserving of such fear.
The recurrence is meaningful: the verb returns at the decisive point, focusing attention on the object of fear and thus reinforcing the proposition.