Having taken a translation from this website, which I am told to have Orthodox Jewish credentials, I am referring to Genesis 22:8-14
'God will see to a lamb for an offering, my son,' replied Abraham. The two of them continued together. When they finally came to the place designated by God, Abraham built the altar there, and arranged the wood. He then bound his son Isaac, and placed him on the altar on top of the wood. Abraham reached out and took the slaughter knife to slit his son's throat. God's angel called to him from heaven and said, 'Abraham! Abraham!' 'Yes.' 'Do not harm the boy. Do not do anything to him. For now I know that you fear God. You have not withheld your only son from Him.' Abraham then looked up and saw a ram caught by its horns in a thicket. He went and got the ram, sacrificing it as an all-burned offering in his son's place. Abraham named the place 'God will See' (Adonoy Yir'eh). Today, it is therefore said, 'On God's Mountain, He will be seen.'
Is there a difference between a lamb and a ram?