사무엘하 8:4의 주석

Dovid destroyed all the chariot [horses]. Because [of the verse], "He must not acquire an abundance of horses for himself"⁵One of the prohibitions specific to the kings of Yisroel. (See Devorim 17:16)

[With] one hundred chariot [horses] remaining. That he required for his riding entourage. [The word] chariot [refers to] four horses as it is said, (Divrei Hayomim II, 1:17) "Chariot for six hundred silver pieces and horses for one hundred and fifty." From here we learn that a chariot refers to four horses.⁶Given that a מֶרְכָּבָה fetched six hundred silver pieces, four times the one hundred and fifty cost of one horse.