The Avodah of Shemoneh Esrei
The Shulchan Aruch (Orach Chaim 98:4) writes that tefillah, specifically the Shemoneh Esrei, is comparable to the offering of a korban. “Prayer stands in place of the sacrifice.
Psak Halacha
Evidence that parts of the Mishnah Berurah were written by the author's son and students, which may explain some contradictions.
The Shulchan Aruch (Orach Chaim 98:4) writes that tefillah, specifically the Shemoneh Esrei, is comparable to the offering of a korban. “Prayer stands in place of the sacrifice.