Ashrei
Ashrei (Hebrew: אַשְׁרֵי, lit. 'happy [is]') is a Jewish prayer recited at least three times daily in Judaism: twice during Shacharit (the morning service) and once during Mincha (the afternoon service). The prayer is composed primarily of the entirety of Psalm 145, with Psalm 84:5 and Psalm 144:15 appended to the beginning and Psalm 115:18 to the end, respectively. The first two verses added both begin with the Hebrew word ashrei, which lends the prayer its name.
In Berakhot 4b:16, Rabbi Elazar, citing Rabbi Avina, is recorded teaching that "anyone who recites Tehillah l'David (תְּהִלָּה לְדָוִד, '[a] Praise [to God] of David') three times every day is assured of a place in the World-to-Come". The Tehillah l'David referred to is Psalm 145; the Rabbis—at least as they were recorded teaching in the Talmud—did not refer to the Ashrei of Rabbinic Judaism as Ashrei.