Mo'ed Katan 18b-19b
Are Tefillin required or prohibited during the intermediate days of the festival? \u2022 Are there any restrictions on how to make tzitzis for oneself during the intermediate days of the festival? \u2022 Biblical and rabbinic aspects of mourning \u2022 May a mourner comb his hair? \u2022 May a mourner take a hot shower before the festival?