ציטירנדיקער פּירוש אויף שופטים 7:9

Shofars and torches to invoke the merit of the giving of the Torah.¹⁰ At Mount Sinai, when the shofar sounded, and fire descended on the mountain. (Shemos, 19:16–19). According to the plain explanation: this took place at night, as it is written,¹¹V. 9. and it was dark. They therefore carried torches to provide them with light. They placed them in pitchers so that the torches would remain undetected.