يَجِبُ عَلَى الْمُصَلِّي أَنْ يُقَدِّمَ الطَّهَارَةَ مِنَ الْأَحْدَاثِ وَالْأَنْجَاسِ عَلَى مَا قَدَّمْنَاهُ
Translation: The worshipper must first establish purification from ritual impurity and physical filth, as explained earlier.
Hadath is ritual impurity removed through wudu, ghusl, or valid tayammum. Najasah is physical impurity subject to removal from the body, clothing, and place of prayer.
Ritual purification and removal of physical filth are distinct requirements. Clean clothes do not replace wudu, while wudu does not automatically clean najasah on clothes or the body.