In the volume of the book (ἐν κεφαλίδι βιβλίου)
Κεφαλίς, N.T.o , is a diminutive, meaning little head. Lat. capitellum or capitulum. The extremity or end, as the capital of a column. See Exo 26:32, Exo 26:37. Sometimes the column itself, as Exo 40:18; Num 3:36. Said to be used of the tips or knobs of the rollers around which parchments were rolled, but no instances are cited. A roll of parchment, a book-roll, Eze 2:9. Meaning here the Scriptures of the O.T. for Hebrew מְגִלָּה. Κεφαλίς is found in lxx with βιβλίου book, only Eze 2:9; Psa 39:7. For, βιβλίον book, see on 2Ti 4:13.