Philo Judaeus De Posteritate Caini 148

[148] But it is not sufficient for the complete enjoyment of his teacher’s lessons, that the disciple should merely comprehend what the master has taught him, unless he has also got memory. On which account, making a display of her bounteous disposition, when he has satisfied himself with the water, she offers to give his camels water also, which we have already said are here put symbolically for memory. For the animal while eating its food ruminates, and when, having stooped down it has received a heavy burden, with exceedingly great vigour of muscle it rises up lightly;