טָ֭עֲמָה כִּי־ט֣וֹב סַחְרָ֑הּ לֹֽא־יִכְבֶּ֖ה בליל [בַלַּ֣יְלָה] נֵרָֽהּ׃
Она понимает, что ее товар хорош; Ее лампа не гаснет ночью.
Rashi
her lamp does not go out at night It is written בליל, with the “hey” missing; on the night of watching (ליל שמורים), when the Egyptians were plagued, it shone for Israel and protected them.