Ki V'simcha
"כִּי בְשִׂמְחָה תֵצֵאוּ וּבְשָׁלוֹם תּוּבָלוּן הֶהָרִים וְהַגְּבָעוֹת יִפְצְחוּ לִפְנֵיכֶם רִנָּה וְכָל עֲצֵי הַשָּׂדֶה יִמְחֲאוּ כָף"
"For you shall go out with joy and be led forth in peace. The mountains and the hills shall burst into song before you, and all the trees of the field shall clap their hands."
This joyous two-part melody is customarily sung at the conclusion of every Farbrengen (Chassidic gathering) as the Rebbe leaves the hall, surrounded by dancing Chassidim, who escort him to his study.
By The Rebbe