18I said in my heart concerning the speaking of the sons of men, that God might make it clear to them, and that they might see that they by themselves are but beasts.
19For that which befalleth the sons of men befalleth beasts; even the same thing befalleth them; as the one dieth, so dieth the other; yea, they have all one kind of spirit: so that the preeminence of man above the beast is nought; for all is vanity.
20Every thing goeth unto one place: every thing came from the dust, and every thing returneth to the dust.
21Who knoweth the spirit of the sons of man that ascendeth upward, and the spirit of the beast that descendeth downward to the earth?
Ecclesiastes 3
Ecclesiastes 3:18-21