Behold, there were brought before him, at eventide coursers of the highest breeding, and swift of foot;
Safinat: literally, horses that stand, when at
ease, on three legs, firmly planted, with the hoof of the
fourth leg resting lightly on the ground.
This would imply breeding and a steady temper, to
match with their quality of swiftness mentioned in the
Yusuf Ali, Abdullah. Translation and Commentary of the Quran. (surah 38 verse 31). Quran Arabic with English Translation & Commentary (Tafsir) by Abdullah Yusuf Ali, Free Download (quran4u.com)