«وَلَا غَرْوَ أَنْ يَحْذُوَ الْفَتَى حَذْوَ وَالِدِهِ»
Why be surprised if a son follows the path of his father?
Ḥadhā ḥadhwahu means to imitate or follow someone closely. The first verse describes Time as the father; the second makes Abū Zayd the son copying it. The two lines form one extended analogy. Lā gharw means “no wonder.”