[1] Traditions in vol. 2 of al-Kāfī indicate that this refers to Nūḥ, Ibrāhīm, Mūsā, ʿĪsā and Muḥammad صلوات الله عليهم, all of whom were both Prophets and Apostles, and favoured above their peers in both categories on account of their knowledge (as is explicitly laid out by Imam al-Ṣādiq صلوات الله عليه in this tradition). The traditions in al-Kāfī explain that Nūḥ, Ibrāhīm, Mūsā, ʿĪsā and Muḥammad صلوات الله عليهم were designated as “those with determination” on account of them having been sent forth by Allāh with both scriptures and legal systems that were binding on all Prophets, Apostles and knowing, conscious peoples until the emergence of the next “one with determination.” And, because Muḥammad صلى الله عليه وعلى آله was the last Prophet, the last Apostle and, most importantly, the last of “those with determination,” the scripture and the legal system he came forth with is binding until the Day of Judgement.