Torah and Tefillah are Considered Like Korbanos:
The Kedushas Levi explains this pasuk as follows:
“You will say that it is a Pesach sacrifice to Hashem.” If you want to bring a korban today, while we are in exile, the way to do it is to say that it is a Pesach. This means that you should speak words of Torah and tefillah while having in mind that you are doing so for Hashem alone.
The Bais Aharon of Karlin zy”a writes similarly on the verse (12:31): “Go and serve Hashem like your words.” He says that this means that one can serve Hashem with words, as long as his words are pure and uttered for the sake of Hashem.
Perhaps we may add that this is also seen from the pasuk (13:9): “So that the Torah of Hashem shall be in your mouth.” If one’s words are guarded “in his mouth”, meaning that one refrains from speaking ill of others and uses his words for Torah and tefillah, one can merit understanding Torah.
