Peregrinatio Aetheriae, 381-384 AD
The most famous of the journals of ancient pilgrimages to the Holy Land was the work of a noble woman from Galicia, a province in Spain. The narrative not only recounts details of the voyage she undertook and the sites she visited but also provides a precious source of information on the liturgy followed by the Church of Jerusalem in the 4th century.
Description of the Sunday liturgy at the Basilica of the Holy Sepulchre
But on the seventh day, that is on the Lord's Day, the whole multitude assembles before cockcrow, in as great numbers as the place can hold, as at Easter, in the basilica which is near the Anastasis, but outside the doors, where lights are hanging for the purpose. And for fear that they should not be there at cockcrow they come beforehand and sit down there. Hymns as well as antiphons are said, and prayers are made between the several hymns and antiphons, for at the vigils there are always both priests and deacons ready there for the assembling of the multitude, the custom being that the holy places are not opened before cockcrow. Now as soon as the first cock has crowed, the bishop arrives and enters the cave at the Anastasis; all the doors are opened and the whole multitude enters the Anastasis, where countless lights are already burning. And when the people have entered, one of the priests says a psalm to which all respond, and afterwards prayer is made; then one of the deacons says a psalm and prayer is again made, a third psalm is said by one of the clergy, prayer is made for the third time and there is a commemoration of all. After these three psalms and three prayers are ended, lo! censers are brought into the cave of the Anastasis so that the whole basilica of the Anastasis is filled with odors. And then the bishop, standing within the rails, takes the book of the Gospel, and proceeding to the door, himself reads the (narrative of the) Resurrection of the Lord. And when the reading is begun, there is so great a moaning and groaning among all, with so many tears, that the hardest of heart might be moved to tears for that the Lord had borne such things for us. After the reading of the Gospel the bishop goes out, and is accompanied to the Cross by all the people with hymns, there again a psalm is said and prayer is made, after which he blesses the faithful and the dismissal takes place, and as he comes out all approach to his hand. And forthwith the bishop betakes himself to his house, and from that hour all the monks return to the Anastasis, where psalms and antiphons, with prayer after each psalm or antiphon, are said until daylight; the priests and deacons also keep watch in turn daily at the Anastasis with the people, but of the lay people, whether men or women, those who are so minded, remain in the place until daybreak, and those who are not, return to their houses and betake themselves to sleep.
Now at daybreak because it is the Lord's Day every one proceeds to the greater church, built by Constantine, which is situated in Golgotha behind the Cross, where all things are done which are customary everywhere on the Lord's Day. But the custom here is that of all the priests who take their seats, as many as are willing, preach, and after them all the bishop preaches, and these sermons are always on the Lord's Day, in order that the people may always be instructed in the Scriptures and in the love of God. The delivery of these sermons greatly delays the dismissal from the church, so that the dismissal does [not] take place before the fourth or perhaps the fifth hour. But when the dismissal from the church is made in the manner that is customary everywhere, the monks accompany the bishop with hymns from the church to the Anastasis, and as he approaches with hymns all the doors of the basilica of the Anastasis are opened, and the people, that is the faithful, enter, but not the catechumens. And after the people the bishop enters, and goes at once within the rails of the cave of the Martyrium. Thanks are first given to God, then prayer is made for all, after which the deacon bids all bow their heads, where they stand, and the bishop standing within the inner rails blesses them and goes out, each one drawing near to his hand as he makes his exit. Thus the dismissal is delayed until nearly the fifth or sixth hour. And in like manner it is done at lucernare [the time when the lamps are lighted], according to daily custom.
This then is the custom observed every day throughout the whole year except on solemn days, to the keeping of which we will refer later on. But among all things it is a special feature that they arrange that suitable psalms and antiphons are said on every occasion, both those said by night, or in the morning, as well as those throughout the day, at the sixth hour, the ninth hour, or at lucernare all being so appropriate and so reasonable as to bear on the matter in hand. And they proceed to the greater church, which was built by Constantine, and which is situated in Golgotha, that is, behind the Cross, on every Lord's Day throughout the year except on the one Sunday of Pentecost, when they proceed to Sion, as you will find mentioned below; but even then they go to Sion before the third hour, the dismissal having been first made in the greater church.
Egeria, Itinerarium, cap. XXIV-XXV