Three times in the year all your males shall appear before Hashem your God in the place that He will choose: on the festival of Matzos, on the festival of Shavuos, and on the festival of Sukkos; and they shall not appear before Hashem empty-handed.
English: "And on the festival of Shavuos" — he compares the festival of Shavuos to the festival of Matzos; just as the festival of Matzos has a make-up period of seven days, so the festival of Shavuos has a make-up period of seven days.
On the daf / in context: Offerings that were not brought on Shavuos itself may be brought during the following week.
Type of Learning
Hekkesh (Chagigah) — Shavuos has a seven-day make-up period.
What Is Learned
The festival offerings of Shavuos may be completed during the seven days that follow the festival.