The Rebbe blesses Chief Rabbi Yitzchak Isaac HaLevi for a joyful and meaningful Shavuot, notes the special status of this year’s “complete” seven weeks of Sefirah, shares a brief Torah insight on the Rambam, and expresses wishes for his good health. Enclosed is the newly published Shavuot booklet from the Rebbe Rayatz's teachings.
https://www.torahrecordings.com/rebbe/004_igros_kodesh/iyar/1031