The present research is about: Offer to God a sacrifice of praise: The meaning of the expression zebah tôdah in Ps 50,14-23. Based on one of the Psalms of Asaph (Psalm 50), therefore, understand the function of this key expression within the material object of this research. Note that the structure is tripartite (vv.1-6; vv.7- 15; vv.16-23). The essential question is the key expression that serves as a theological and emulating element in poetry. Then question arises, what would the godly do not be enough? If it were carried out only by ritualism, by formalism, in fact, it would not have the value it deserves. Just as if the wicked one repents and changes his conduct, he will also be saved by offering zebah tôdah to YHWH. In turn, the methodology employed is in the development of the steps of the Historical-Critical Method, which allows to perceive by its comprehensiveness, the text in its primary form, this methodology combined with the Semitic Biblical Rhetorical Analysis, which is a synchronic method, helps in the construction of the structure of the text. In addition to the introduction that addresses the theme, the text in its context, and also the conclusion with biblical-theological-pastoral perspectives, this research is divided into three chapters: 1) The Exegesis of Ps 50,1-23 according to the criteria of the Historical-Critical Method and the gains of the ARBS; 2) the exegetical-theological commentary; with the contributions of specialized authors, from books, articles, theses and dissertations in this bibliographic review; 3) The term zebah in the Old Testament and its respective meanings, as well as in the Psalter, including a theological-exegetical commentary on vv.14.23.