Likutei Moharan 38:4/ליקוטי מוהר"ן ל״ח:ד׳

14. And speech is rectified through the Torah a person studies under difficult circumstances, in poverty and distress. This is an aspect of night. For then “an end to all flesh” rules, as in, “He puts an end to darkness”; and as is written, “and the darkness He called Night” (Genesis 1:5). {“With the first light of morning, the men were sent on their way together with their donkeys” (Genesis 44:3).}

2Also, our Sages taught: Whoever studies Torah at night has a thread of lovingkindness drawn over him during the day (Chagigah 12b). Lovingkindness is an aspect of “the morning of Avraham,” as is written in the Zohar: “With the first light of morning”—this is the morning of Avraham; “the men were sent on their way”—these are the masters of judgment; “together with their donkeys”—they and the entire side of impurity.

3This is as it is written (Ruth 3:13), “Lie down until morning.” Then, all the opposing forces that rule over speech fall away. At that time the spoken word emerges in song, praise and acclaim for the Holy One, as is written, “O Lord, do not keep Yourself silent” (Psalms 83:2) ; and as is written, “so that [my] soul might sing to You and not be stilled” (Psalms 30:13). For then “the morning stars sang together” (Job 38:7).

4{“Our feet stood inside your gates, O Yerushalayim” (Psalms 122:2).} And this is the meaning of “Our feet stood.” For speech is called a foot, as is written, “whom righteousness met wherever he set his foot” (Isaiah 41:2), and as is written, “you should speak righteousness” (Psalms 58:2). “Inside your gates, O Yerushalayim”—by means of the Torah, as Rashi explains.