[F]requent jot / Of his hard ſetting jade did ſo confound / The vvords that he by papyr-ſtealth had got, / That their loſt ſenſe the youngſter could not ſound, / Though he vvith mimical attention did abound.Jade here refers to “a horse too old to be put to work”.
1640 (date written), H[enry] M[ore], “ΨΥΧΟΖΩΙΑ [Psychozōia], or A Christiano-platonicall Display of Life, […]”, in ΨΥΧΩΔΙΑ [Psychōdia] Platonica: Or A Platonicall Song of the Soul, […], Cambridge, Cambridgeshire: […] Roger Daniel, printer to the Universitie, published 1642, book 2, stanza 47, page 26