(1) These rak‘ahs are specified as: “Four rak‘ahs before Zuhr…” as will appear in the narration recorded by al-Nasā’ī and al-Tirmidhī. Some have held that this specification is *mudraj*—an interpolation into the hadith—but there is no sound evidence for that claim. The basic presumption is that whatever is transmitted within a hadith forms part of it; mere variation between reports does not establish *idrāj* (interpolation). In any event, the variation here is not detrimental, since the supporting evidence favors accepting this addition. Take note! (2) An authentic hadith. It was narrated by Muslim in the Book of the Prayer of Travellers, Chapter on the Virtue of the Regular Sunnah Prayers Before and After the Obligatory Prayers and Their Number, no. 728—and this is his wording; by al-Dārimī in his *Sunan* (1:335); and by Abū Dāwūd in the Book of Prayer, Chapter on the Categories of Voluntary Prayer and the Rak‘ahs of the Sunnah, no. 1250 (1:486, *Awn*). All three transmit it without this explanatory wording. The hadith with this wording was narrated by al-Nasā’ī in Night Prayer, Chapter on the Reward of One Who Prays Twelve Rak‘ahs During the Day and Night (3:262); al-Tirmidhī in the Book of Prayer, Chapter on What Has Been Reported Concerning One Who Prays Twelve Rak‘ahs During the Day and Night, no. 415 (1:319, *Tuhfah*); and al-Hākim (1:311), who declared it authentic according to Muslim’s criteria, although its chain includes a narrator from whom Muslim did not transmit! Ibn Hibbān also declared it authentic (no. 614, *Mawārid*). Note: One narration reads, “and two rak‘ahs before Asr,” in place of “and two rak‘ahs after Ishā.” The reliably preserved wording (*mahfūz*) is the one given here; the other narration—namely, “and two rak‘ahs before Asr”—is anomalous (*shādh*).