Tosefta su Deuteronomio 8:78

The commandment is to bring [the first fruits] of the seven types (Deut. 8:7-8), and if he only brought one type, he fulfilled his obligation. How so? He brings barley and places it on the bottom, and then something else on top of it; and then the next-to-the bottom is wheat, and then something else on top of that; and next he puts olives on top of them, and then figs on top of all of them, and surrounds them with grape clusters from the outside. They would not ascend [to Jerusalem] alone, but rather town by town (פלכים פלכים). They would not walk the entire day, but rather two thirds of the day. A cantor from the synagogue would go up with them and they would sleep in the streets of the city. They would not enter anyone's house due to [the possibility of contracting] tent-impurity, which requires a burnt offering an a peace offering. They would not occupy themselves [with distractions] during the journey [to Jerusalem] in the way that they would occupy themselves on the return journey.... When they arrived at the Temple Mount, even King [Herod] Agrippa would hoist a basket [of first fruits] on his shoulders and proceeded until he arrived at the Temple Courtyard. When he arrived at the Temple Courtyard, the Levites sang the psalm, "I extol you, O Lord, for You have lifted me up, and not let my enemies rejoice over me" (Ps. 30:1, JPS tr.). The birds that were tied to the baskets were offered as burnt-offerings, and whatever was in their hands they gave to the Priests.

The Beracha (blessing) of Zimun is from the Torah (i.e. a Torah obligation) as it is said, “And you should eat, and be satisfied, and bless…” (Deuteronomy 8:10), this is [a reference to] the Beracha of Zimun. “… Hashem, your God …” (Deuteronomy 8:10), this is [a reference to] the first Beracha [of Birkat Hamazon (Grace After Meals)]. “… for the land …” (Deuteronomy 8:10), this is [a reference to] the Beracha about the land (i.e. the second Beracha) [of Birkat Hamazon]. “… the good …” (Deuteronomy 8:10), this is [a reference to the Beracha about] Jerusalem (i.e. the third Beracha) [of Birkat Hamazon] as it is said “… this good mountain and Levanon.” (Deuteronomy 3:25). “… which He has given you.” (Deuteronomy 8:10), this is [a reference to the Beracha of] Hatov Vehameitiv (The Good and Who does good) (i.e. the fourth Beracha) [of Birkat Hamazon].

From where [do we know] that just like you have to say a Beracha (blessing) after [eating food] you also have to say a Beracha before [eating food]? The Torah teaches us, “… which He has given you” (Deuteronomy 8:10), [meaning] from the moment that He gave [the food] to you, [you have to say a Beracha on it.] From where [do we know] that [you have to say a Beracha] even on [seeing] mountains and hills? The Torah teaches us, “… for the land …” (Deuteronomy 8:10). From where [do we know] that [you have to say a Beracha] even on [studying and reading] the Torah and on [performing] Mitzvot (commandments)? The Torah teaches us, “… which He has given you” (Deuteronomy 8:10), and it says, “… and I will give you the tablets of stone …” (Exodus 24:12).