وَيَوْمَ عَقَرْتُ لِلْعَذَارَى مَطِيَّتِي
فَيَا عَجَبًا مِنْ كُورِهَا الْمُتَحَمَّلِ
And the day when I slaughtered my riding animal for the young women—how remarkable that its saddle had to be carried away!
ʿAqartu here means to slaughter the animal, maṭiyyatī is the poet's mount, and kūr is the camel saddle or riding gear placed upon it.
The remembered happy day is not merely named. The poet describes a concrete event: giving up the mount, transporting its equipment, and being with the young women. The following verse develops the scene.