Tosefta על בכורים 3:1

The mitzvah is to bring [the first fruits] in seven vessels (i.e., corresponding to the seven species, see Deut. 8:7-8), but if he brought them in [only] one vessel, 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. § The times of the wood offering of the Priests and the people are nine (Taanit 4:5), and they require staying overnight, [but the inhabitants of the city] would not occupy themselves with them (i.e., those involved in the wood offerings) the way they would occupy themselves with those bringing the first fruits. § During the entire journey, one had the right to give [the baskets containing the first fruits] to his slave or to his relative [to carry on his behalf], until he arrived at the Temple Mount. Once they arrived at the Temple Mount, even King [Herod] Agrippa would hoist the basket [of first fruits] onto 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.). [At that point,] the birds that were tied to the baskets were offered as burnt-offerings, and whatever was in their hands they gave to the Priests.