As for al-Māhī, al-Hāshir, al-Muqaffī, and al-‘Āqib, these names are explained in the hadith of Jubayr ibn Mut‘im. Al-Māhī—the effacer—is the one through whom Allah effaced disbelief. Through no other created being was disbelief effaced as it was through the Prophet, may Allah bless him and grant him peace. When he was sent, all the inhabitants of the earth were disbelievers, except for a few remaining people on earth (1). Its inhabitants included idol worshippers; Jews who had incurred Allah’s wrath; Christians who had gone astray; Sabians of the Dahriyya who acknowledged neither a Lord nor resurrection; worshippers of the stars; worshippers of fire; and philosophers who neither knew nor acknowledged the revealed laws of the prophets. Through His Messenger, Allah, glorified is He, effaced all this, until Allah’s religion prevailed over every other religion, reached wherever night and day reach, and his call travelled across the lands as the sun does.
As for al-Hāshir—the gatherer—gathering means bringing together and assembling. He is the one at whose feet people will be gathered, as though he had been sent to gather them.
Al-‘Āqib—the final successor—is the one who came after the prophets, with no prophet to come after him. Al-‘Āqib means the last, so it has the same sense as the seal. Hence he was called “al-‘Āqib” without qualification: he succeeded the prophets, coming after them.
Al-Muqaffī—the one who follows in his predecessors’ footsteps—has a similar meaning. He followed in the footsteps of the messengers who preceded him (2), and Allah sent him to follow in their footsteps. This word derives from qafw (following behind). One says qafāhu, yaqfūhu, meaning that someone came after another. From the same root come qāfiyat al-raʾs (the back of the head) and qāfiyat al-bayt (the rhyme at the end of a verse). Thus al-Muqaffī is the one who followed the messengers before him, becoming their seal and the last of them.