How do we bring the bikkurim up [to the Beis HaMikdash]? All the [people of the] cities in the maamad gather in the city of the maamad.  They stay overnight in the town square and they would not enter the houses.  And in the morning, the appointee would say, “Let us rise and ascend to Zion, to [the House of] Hashem our God” (Jeremiah 31:5).