Seven Weeks, Two Leavened Loaves, and Gleaning
Pentecost was already a Torah feast before Acts 2—and Leviticus places leavened loaves and care for the poor/foreigner right inside its celebration.
Where this fits in the story: The count grows out of the first-sheaf rite and culminates the early harvest cycle.
Where Scripture takes it next: Acts 2:1–41 — Very Strong explicit festival setting. The Spirit comes when the day of Pentecost has arrived.
Evidence boundary: The two loaves are explicitly leavened. That single fact prevents “leaven always equals sin” from functioning as a universal Bible code.