Adam Clarke on Genesis 32:14

Two hundred she-goats, etc. - This was a princely present, and such as was sufficient to have compensated Esau for any kind of temporal loss he might have sustained in being deprived of his birthright and blessing. The thirty milch camels were particularly valuable, for milch camels among the Arabs constitute a principal part of their riches, the creature being every way so serviceable that the providence of God appears peculiarly kind and wise in providing such a beast for those countries where no other animal could be of equal service. "The she-camel gives milk continually, not ceasing till great with young; the milk of which," as Pliny has remarked, "when mixed with three parts of water, affords the most pleasant and wholesome beverage." Cameli lac habent, donec iterum gravescant, suavissimumque hoc existimatur, ad unam mensuram tribus aquae additis - Hist. Nat., lib. 11., chap. 41.