The Shabbat after the Ninth of Av is called Shabbat Nachamu ("Shabbat of Consolation") after the opening words of the day's reading from the prophets ("haftara"). This is the first of the series of readings known as "The Seven of Consolation" read in the seven weeks from the Ninth of Av to Rosh Hashanah.
I beseeched G‑d at that time (Deuteronomy 3:23)
Prayer is called by ten names: cry, howl, groan, song, encounter, stricture, prostration, judgment and beseeching.
[These synonyms for prayer are derived from: Exodus 2:23–24, Jeremiah 7:16, Psalms 18:6, Deuteronomy 9:25, Psalms 106:30 and Deuteronomy 3:23.]
(Midrash Rabbah)
https://w2.chabad.org/media/pdf/116357.pdf