مَنْ بَطَّأَهُ عَمَلُهُ، لَمْ يُسْرِعْ بِهِ نَسَبُهُ
Translation: Whoever is held back by their deeds will not be carried forward by their lineage.
Source: مسلم
بَطَّأَهُ عَمَلُهُ means “their deeds held them back”: the ending ـهُ on the verb is an object pronoun, while عَمَلُهُ is the subject. In لَمْ يُسْرِعْ, لَمْ negates the imperfect verb and makes it jussive: “will not speed them forward.” نَسَبُهُ means their lineage.
Family background by itself cannot replace responsible action and God-consciousness. Respect for family is not denied; rather, personal shortcomings are not erased merely by claiming distinguished ancestry.