The rabbis of the Talmud were aware of occurrences of inclusio in the Bible, as shown by Rabbi Yohanan's comment in the Babylonian Talmud, Berakhot 10a that "Any psalm dear to David he opened with ""Ashrei"" ("happy is he) and closed with ""Ashrei"". Redactors of rabbinic document frequently made use of inclusio to mark off the endpoints of literary units of different sizes and possibly to suggest conceptual connections between seemingly disparate statements. At the end of the Mishnah, tractate Kelim, Rabbi Yose explicitly notes the phenomenon: "Happy are you, Kelim, in that you opened with regarding impurity and departed with regarding purity." Tractate Berakhot, which opens with a discussion of the laws of reciting the Shema Yisrael ("Hear O Israel") passage from Deuteronomy 6:4-9, concludes with a homiletic interpretation of the second verse from this passage (v. 5), showing how the ritual recitation of the tractate's opening may serve as a source of spiritual instruction at the tractate's end. The Mishna in tractate Nazir is framed by allusions to two famous biblical Nazirites - Samson (Nazir 1:2) and Samuel (Nazir 9:5), representing respectively negative and positive exemplars of this institution.