וכי תזבחו זבח שלמים לרצונכם תזבחהו
Ramban explains that when one offers a korban, sacrifice, to Hashem, the intention behind and accompanying it “shall be to find favor for oneself… like a servant ingratiating himself to his master… without any service for the purpose of receiving reward, but only to carry out the ratzon, will, of Hashem, for it is His simple will that constitutes what is appropriate and obligatory.” In other words, the kavanah, intention, of the individual who is slaughtering the animal is not for the shechitah, ritual, but simply to serve Hashem by carrying out His will. This is how a Jew should…