'Man's' in the Bible

He killed an Egyptian also, a man of great stature, five cubits tall. In the Egyptian’s hand was a spear like a weaver’s beam, and Benaiah went down to him with [only] a staff (rod) and grabbed the spear from the Egyptian’s hand and killed him with his own spear.

"Who am I, LORD God, and what is my household, since you have brought me to this? Furthermore, this is a small thing to you, God, and yet you have spoken concerning your servant's household for a great while to come, and you have seen in me the fulfillment of man's purpose, LORD God.