Mamer Vehaya Eikev Tishmeun 5716, part 2 שפ עקב, כף מנחם אב, ה'תשטז' והי' עקב תשמעון
https://www.torahrecordings.com/mamorimmelukotim/004/042 Limitless Avodah—From Thought to Covenant The maamar explains that “תשמעון” spans thought, speech, and action, and when a Jew serves with total, boundless devotion, it draws down the covenant, kindness, and oath—revealing the infinite will of Hashem within the finite world.