Per clause 5 of House Rule II the Chaplain offers a prayer at the start of each legislative day.
Guest Chaplains are permitted in the Chamber and each Member may consider inviting a member of the clergy from his or her district to offer the daily prayer. The inviting Member traditionally gives the first one-minute speech of the day to recognize their Guest Chaplain (see section 2.6 of this Manual for information about one-minute speeches). Each Member is limited to inviting one Guest Chaplain per Congress. Members should contact the Office of the Chaplain for additional information at 225-2509.