'Lamb' in the Bible

So Samuel took a nursing lamb and offered it as a whole burnt offering to the Lord; and Samuel cried out to the Lord for Israel and the Lord answered him.

But David said to Saul, “Your servant was tending his father’s sheep. When a lion or a bear came and took a lamb out of the flock,

I went out after it and attacked it and rescued the lamb from its mouth; and when it rose up against me, I seized it by its whiskers and struck and killed it.