[Hatta tawarat] means: it disappeared; meaning: the sun, [bil-hijab] (behind the veil), so he missed the afternoon prayer (Asr).
﴿حَتَّى تَوَارَتْ﴾ غَابَتْ؛ يَعْنِي: الشَّمْس ﴿بالحجاب﴾ ففاتته صَلَاة الْعَصْر
