Maximum number of horses for which a single warrior receives spoils shares?

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A warrior is allotted shares for a maximum of two horses; four shares for the horses (two each) and one share for the owner, totaling five shares. This is supported by narrations from Al-Awza'i citing the practice of the Prophet (peace be upon him) and a letter from Umar ibn al-Khattab to Abu Ubaydah directing this distribution, with any additional horses being considered auxiliary mounts (jana'ib).