Likutei Sichos Vol 28 – 12 Sivan, Rabbi Chaim Wolosow
https://www.torahrecordings.com/likutei-sichos/028/007_001 לקוטי שיחות חלק כח - י"ב סיון Likutei Sichos Vol. 28 – 12 Sivan – Shavuos Beyond Yom Tov: The Essential Bond That Extends Into Weekdays This sicha explores why the korbanos of Shavuos may be brought even on weekdays after Yom Tov. The Rebbe explains that Shavuos reflects Hashem’s essential and unconditional choice of the Jewish people — a bond that transcends time, form, and the distinction between Yom Tov and weekday.