Menachot 93 - Who Has to Perform Leaning on the Sacrifices
There are also categories of people who can bring a sacrifice without leaning altogether, and these include a non-Jew, a slave, an agent, and a woman. The agent of a person cannot perform leaning, because it says "your hand" - and not your agent's hand. A woman is not required to lean on her sacrifice because the Torah said "sons of Israel," to exclude "daughters of Israel" from the requirement of leaning.
Even if one is required to perform leaning and does not do it, the sacrifice is valid - although it is not done completely right. The leaning is done with both hands and is immediately followed with slaughter.
Art: Raphael - The Mute Woman
