Leviticus 1:3-9

The beast to be offered must be a male, and without blemish, and the best he had in his pasture. Being designed purely for the honour of him that is infinitely perfect, it ought to be the most perfect in its kind. This signified the complete strength and purity that were in Christ the dying sacrifice, and the sincerity of heart and unblamableness of life that should be in Christians, who are presented to God as living sacrifices. But, literally, in Christ Jesus there is neither male nor female; nor is any natural blemish in the body a bar to our acceptance with God, but only the moral defects and deformities introduced by sin into the soul.