Aimed at identifying the function of the aspects of remembering and forgetting in the Psalter, this opus seeks to offer a lexicographical synthesis of zkr and skh in the Psalter and an analysis of their function in Book III (Pss 73-89) and in Ps 78, text in which the notions of remembering and forgetting occupy a relevant role. By doing so, the detailed focus on a particular portion of the Book of Psalms makes it possible to highlight the importance of the theme of memory and that of forgetting in the whole Psalter, both from the point of view of the composition of its global message, and from the point of view of a focused re-reading of the traditions that have to do with the origins of Israel. For its readers the Psalter turns out to be a book about remembrance and for remembrance. The opus offers a lexicography of zkr and skh and an analysis of their function in Book III of the Psalter (Pss 73-89) and in Ps 78. The Psalter is analysed on a canonical perspective; the Ps 78 is considered mainly from an intertextual point of view. For its readers the Psalter turns out to be a book about remembrance and for remembrance.