“Let those who desire (to see the triumph) of my rightness, sing praises and rejoice, and let them constantly say, “May haShem, Who desires the peace of His servant, be magnified” (Tehillim, 35:27)
From the notes of Rabbi Levi Yitzhak Schneersohn on the book Tehilim:
– David ha-Melekch said that because he embodied the sefirah of malchut (“kingdom”, governance). And so it’s written: “(to see the triumph) of my rightness” (צִדְקִי in the original Hebrew). “Tzedek” (the rightness) is a manifestation of the “malchut” on the highest level of holiness.
And it’s said צִדְקִי – with the letter “yud” in in end (“my rightness”) – because David was an ideal embodiment (“chariot”) for the sefirah of malchut (and he could actually say all the above about himself).
See more: “ליקוטי לוי יצחק”, חלק ג’, עמוד תכז.
Rabbi Levi Yitzchak, the Rebbe’s father, was Chief Rabbi of Yekaterinoslav (currently Dnepropetrovsk), and was arrested and exiled to Kazakhstan by the Stalinist regime as a result of his work to preserve Jewish life in the Soviet Union.
Each year on the 20th of Menachem Av, the Rebbe would hold a chassidic gathersing – farbrengen – to celebrate his life and to highlight his priceless contribution to the study of Chassidut.