Muhammad said: "Until the Day of the known time," meaning: the first blast [of the Trumpet]. The enemy of Allah intended to be delayed until the second [resurrection] blast.
قَالَ محمدٌ: ﴿إِلَى يَوْمِ الْوَقْتِ الْمَعْلُومِ﴾ يَعْنِي: النفخة الأولى , وَأَرَادَ عَدو اللَّه أَن يُؤَخر إِلَى النفخة الْآخِرَة.