amoxtli.

See an image that represents amoxtli in the Visual Lexicon of Aztec Hieroglyphs, ed. Stephanie Wood (Eugene, Ore.: Wired Humanities, 2020-present).

yn amuxtli, yn tlacujlolli: in qujpia yn tlilli, yn tlapalli, yn matile, un piale, yn nonotzale, yn oqujto = the picture {writing}, the ink, {and} the colors for painting; the knowledge, the wisdom which hath been uttered. (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 1 -- The Gods; No. 14, Part 2, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1950), 9.

yn iuh quittac yn amostli = as she saw it in the book (late sixteenth century, Central Mexico)
Louise M. Burkhart, Before Guadalupe: The Virgin Mary in Early Colonial Nahuatl Literature, Institute for Mesoamerican Studies Monograph 13 (Albany: University at Albany, 2001), 45.

in ipã amostli yn itoca de scalla celli = in the book called Scala celi (late sixteenth century, Central Mexico)
Louise M. Burkhart, Before Guadalupe: The Virgin Mary in Early Colonial Nahuatl Literature, Institute for Mesoamerican Studies Monograph 13 (Albany: University at Albany, 2001), 135.

Inamox, intlacuilol. Zan ic no yehoatl quitoznequi: intlil, intlapal. = Their books, their writings. This means the same as, their black and their red.
Thelma D. Sullivan, "Nahuatl Proverbs, Conundrums, and Metaphors, Collected by Sahagún," Estudios de Cultura Náhuatl 4 (1963), 176–177.

Auh xicmocujtlavi in tlilli, in tlapalli, in amuxtli, in tlacujlolli: intloc innaoac ximocalaquj in iolizmatque, in tlamatinj = And take care [to understand] the writings, the books, the paintings. Enter with the prudent, the wise. (central Mexico, sixteenth century)
Fr. Bernardino de Sahagún, Florentine Codex: General History of the Things of New Spain; Book 6 -- Rhetoric and Moral Philosophy, No. 14, Part 7, eds. and transl. Arthur J. O. Anderson and Charles E. Dibble (Santa Fe and Salt Lake City: School of American Research and the University of Utah, 1961), 215.

"Inin quaderno amoxtli itech neztoc tlilancoc inin ixiuatlapualtzi in totecuiyo Dios inic ó mochiuhchtaya initech in cahuitl in huehetixtlamaque ipan inin Nueva España. In quenami neztoc inipan original zanyuhqui inic oniquiixcopin nehuatl Marcel de Zalazar, etc." = "In this book appears written this year count of our Lord God how it is shown what happened in the time of the old wise ones here in New Spain. As it appeared in the original, thus I, Marcelo de Salazar, etc., copied it." (Bartolache Annals, 1454–1737)
Frances Krug, "The Nahuatl Annals of the Tlaxcala-Puebla Region," ch. 2, pp. 103–104, Ph.D. Dissertation draft written in the 1980s, with transcriptions and translations approved by James Lockhart. Cited here by SW.