Our book of Psalms is a collection of smaller collections of just such hymns and prayers to be used in worship. Each one of these smaller collections came out of some synagogue or group of synagogues, or was prepared by the members of one of the choirs who led the worship in the temple. By studying these we may learn something about how they were used. =The Prayers of David.=--This was the title of one of these smaller books. It contained Psalms 2 to 41, and some others of our book of Psalms. All of these are headed in our Bible, "A Psalm of David." These words, in the original Hebrew, mean "dedicated to David." The last page in this smaller book is perhaps now found where our Psalm 72 comes to an end with the words, "The Prayers of David the Son of Jesse are Ended." This sentence corresponded, in the little book, to the words, "The End," in our modern books. It was copied in what is now our book of Psalms, even though it is no longer "the end." These "David" hymns were probably written not only by David, but as well by members of a synagogue of worshipers who were poor and oppressed. There are a great number of references to "enemies." "Deliver me not over unto the will of mine adversaries." "Thou preparest a table before me in the presence of mine enemies." These people probably lived in the days before the reforms of Nehemiah, when there were indeed many enemies both outside of Jerusalem and within the city, heathen robbers, and rich oppressors of their own race, men who cheated them and who mocked them when they prayed for help to Jehovah. =The Pilgrim Songs.=--Another very different hymn book embedded in our book of Psalms is one which we may call the "Pilgrim Songs." It is found in chapters 120 to 134 of our Psalter. All of these psalms have the title, "A Song of Ascents." This probably means a song to sing on the ascent to Jerusalem. These come from the happy time after Nehemiah when the city was safely protected by walls. Because of this blessed safety it was now possible for the people once more to go on pilgrimages to the great annual religious feasts as prescribed in the law-book of Deuteronomy. Before the walls were rebuilt such gatherings of pilgrims with their gifts would merely have been an invitation to robbers. But now the custom of pilgrimages was renewed, and they came to be among the happiest events of the year in the lives of Jewish men and women and older boys and girls. The journey to Jerusalem was usually made in large companies or caravans for the sake of protection. For the roads outside of Jerusalem were by no means safe. And naturally in such a crowd of folks from the home village there would be much singing. These "Pilgrim Songs" grew out of the spirit of these journeys. They are filled with gratitude to God for his kindness, and with trust in his care, and with pride in their beautiful city Jerusalem which God had helped them to rebuild.