אתה הראת לדעת כי ה' הוא האלקים אין עוד מלבדו – מאמרים מלוקט חלק ג - יום ב' דחג השבועות, ה'תשמ"ו

The Rebbe teaches that at Matan Torah, Hashem revealed His absolute unity—'Ein Od Milvado'—in a way that could be sensed. This maamar explores the difference between 'tal' (dew) and 'geshem' (rain) in Torah, showing how Torah's inner dimension is a constant, transcendent vitality.

https://www.torahrecordings.com/mamorimmelukotim/003/050