It is because of the elegance of the language that it will not repeat a noun each time: After it is mentioned the first time, if it is a subject, all of the predicates will imply it. And if it is a direct object, it will be implied to through a pronoun (like ושחט אותו - and slaughter it, והזה עליו - and sprinkle upon it, ושחטו - and slaughter it). And this is a rule in all languages. Thus, any place where a noun is repeated unnecessarily, whether it is a subject or an object – there will always be a homiletical interpretation. And these homiletical interpretations will be in several ways.