(Exodus 22:21) "Every widow and orphan you shall not afflict": This tells me only of widow and orphan. Whence do I derive (the same for) all men? It is, therefore, written "lo ta'anun", (the additional "nun" implying an extension of plurality). These are the words of R. Yishmael. R. Akiva says: Widow and orphan are more vulnerable to affliction. Scripture speaks of the common instance.