12. The after blessing of Birchas Hamazon:

It is beyond the scope of this chapter to discuss the extensive and detailed laws of Birchas Hamazon. These laws will feature in several chapters in volume 2 which will cover all laws relating to a Hamotzi meal. Below we will focus simply on some general laws.

Biblical or Rabbinical: After eating bread made from the five grains, one is Biblically required to recite Birchas Hamazon if they are satiated from the meal. If they eat at least a Kezayis but are not fully satiated, the obligation is Rabbinical. Only the first three blessings of Birchas Hamazon are Biblical; the fourth is Rabbinical. See Chapter 1 Halacha 1 for the full details of this subject!

On what foods is it said: The after blessing of Birchas Hamazon is recited after eating a Kezayis of Hamotzi bread, or eating Shiur Kevius Seuda of Mezonos bread as explained in length in chapters 8-9.

Bedieved if said on food of another after blessing: See Halacha 15I! One who said the after blessing of Birchas Hamazon in place of the after blessing of Borei Nefashos, does not fulfil his obligation and is hence obligated to repeat the blessing of Borei Nefashos. Likewise, one who said the after blessing of Birchas Hamazon in place of the after blessing of Al Hapeiros, does not fulfil his obligation and is hence obligated to repeat the blessing of Al Hapeiros with exception to dates in which case one fulfills his obligation Bedieved. However, if one said the after blessing of Birchas Hamazon in place of the after blessing of Al Hamichyah then one fulfills his obligation Bedieved.

Likewise, one who said the after blessing of Birchas Hamazon in place of the after blessing of Al Hagafen fulfills his obligation Bedieved.

Bedieved if said wrong after blessing instead of Birchas Hamazon: See Halacha 15A & H! One who said the after blessing of Meiyn Gimel or Borei Nefashos in place of the after blessing of Birchas Hamazon then he does not fulfil his obligation.

If ate a total of a Kezayis of two foods with one being Birchas Hamazon: Then the lower level blessing [Meiyn Gimel or Borei Nfeashos] is recited, as explained in Halacha 8.