Explanation:

• Chumash (חומש): Refers to the Five Books of Moses (the Torah), which are divided into daily portions for study.
• Tehillim (תהילים): Refers to the Book of Psalms, which is also divided into daily readings.
• Tanya (תניא): Refers to the foundational text of Chabad Chassidic philosophy, written by Rabbi Shneur Zalman of Liadi, which is also studied in daily portions.

The study of ח"ת"ת is a daily practice encouraged within the Chabad-Lubavitch community. It combines the study of the Torah, the recitation of Psalms, and the teachings of Chassidut, providing a balanced spiritual regimen that nurtures both the intellectual and emotional aspects of one’s connection to Hashem.