Rambam - Book of Love - Laws of Prayer - Chapter 3

This is the second book of the Mishneh Torah of the Rambam, Rabbi Moshe ben Maimon. Laws of Tefillah.
This chapter explains when the time for Tefillah (the afternoon prayer) begins, including the major and minor afternoon prayers. It also covers the time for the additional Tefillah (Musaf) and the night prayer, and whether these are obligatory. It addresses who prays before the designated time for the afternoon prayer or the Shabbat prayer on Friday. It explains which prayer comes first for someone who has two prayers to perform, the afternoon and the additional one, and whether they have missed the designated time for prayer.