Birkat HaMazon Sources

(7) For your God יהוה is bringing you into a good land, a land with streams and springs and fountains issuing from plain and hill; (8) a land of wheat and barley, of vines, figs, and pomegranates, a land of olive trees and honey; (9) a land where you may eat food without stint, where you will lack nothing; a land whose rocks are iron and from whose hills you can mine copper. (10) When you have eaten your fill, give thanks to your God יהוה for the good land given to you.

...With regard to the origins of the four blessings of Grace after Meals, Rav Naḥman said:
Moses instituted for Israel the first blessing of: Who feeds all, when the manna descended for them and they needed to thank God.
Joshua instituted the blessing of the land when they entered Eretz Yisrael.
David and Solomon instituted the third blessing: Who builds Jerusalem, in the following manner:
David instituted “…on Israel Your people and on Jerusalem Your city…” as he conquered the city,
and Solomon instituted “…on the great and Holy Temple…” as he was the one who built the Temple.
They instituted the blessing: Who is good and does good, at Yavne in reference to the slain Jews of the city of Beitar at the culmination of the bar Kokheva rebellion. They were ultimately brought to burial after a period during which Hadrian refused to permit their burial. As Rav Mattana said: On the same day that the slain of Beitar were brought to burial, they instituted the blessing: Who is good and does good, at Yavne. Who is good, thanking God that the corpses did not decompose while awaiting burial, and does good, thanking God that they were ultimately brought to burial.

On the topic of the blessings of Grace after Meals, the Gemara adds that the Sages taught in a baraita that the order of Grace after Meals is as follows: The first blessing is the blessing of: Who feeds all; the second is the blessing of the land; the third is: Who builds Jerusalem; and the fourth is: Who is good and does good...

The Sages taught in a Tosefta: From where is it derived that Grace after Meals is from the Torah? As it is stated: “And you shall eat and be satisfied, and you shall bless the Lord, your God, for the good land that He has given you” (Deuteronomy 8:10). The Gemara explains: And you shall bless, that is the blessing of: Who feeds all. The Lord, your God, that is the zimmun blessing in which God’s name is invoked. For the land, that is the blessing of the land; good, that is the blessing: Who builds Jerusalem, and it also says: “This good mountain and Lebanon” (Deuteronomy 3:25), which is interpreted homiletically as referring to Jerusalem and the Temple. That He gave you, that is: Who is good and does good...

With regard to the formula of Grace after Meals, the Gemara continues: It was taught in a baraita: Rabbi Eliezer says: Anyone who did not say: A desirable, good, and spacious land in the blessing of the land, and who did not mention the royal house of David in the blessing: Who builds Jerusalem, did not fulfill his obligation.

Naḥum the Elder says: One must mention the covenant of circumcision in the blessing of the land. Rabbi Yosei says: One must mention the Torah in the blessing of the land...

...Regarding blessings that do not conform to the formula instituted by the Sages, the Gemara relates that Binyamin the shepherd ate bread and afterward recited in Aramaic: Blessed is the Master of this bread. Rav said, he thereby fulfilled his obligation to recite a blessing.

The Gemara objects: But didn’t Rav himself say: Any blessing that does not contain mention of God’s name is not considered a blessing?

The Gemara emends the formula of his blessing. He said: Blessed is the All-Merciful, Master of this bread.

The Gemara asks: But don’t we require three blessings in Grace after Meals? How did he fulfill his obligation with one sentence?

The Gemara explains: What is: Fulfills his obligation, that Rav also said? He fulfills the obligation of the first of the three blessings, and must recite two more to fulfill his obligation completely.

The Gemara asks: What is he teaching us? The Gemara answers: Although he recited the blessing in a secular language, other than Hebrew, he fulfilled his obligation...