Philo Judaeus De Virtutibus 160

[160] You see, therefore, what great humanity and compassion our lawgiver displays, and how he diffuses his kindness over every species of man, even if they are foreigners, or even enemies; and secondly, how he extends it also to brute beasts, even though they be not clean, and in fact to every thing, to sown crops, and to trees. For the man who has learnt the principles of humanity with respect to those natures which are devoid of sense, is never likely to err with respect to those which are endowed with life; and he who never attempts to act with severity towards creatures which have only life, is taught a long way off to take great care of those which are also blessed with reason.