Definition of "pantoffle"

Ile tell you Lady, / Since you riſe up his Advocate, and boldly, / (For now I finde, and plainly, in whoſe favour / My love and ſervice to you was neglected) / For all your wealth, nay, adde to that your beauty, / And put your vertues in if you have any, / I would not yet be pointed at, as he is, / For the fine Courtier, the womans man, / That tells my Lady ſtories, diſſolves riddles, / Uſhers her to her Coach, lyes at her feet / At ſollemne Maskes, applauding what ſhe laughs at; / Reads her aſleep a nights, and takes his oath / Upon her Pantoffles, that all excellence / In other Madams doe but zany hers: / Theſe you are perfect in, and yet theſe take not / Or from your birth or freedome.

1616–1618, John Fletcher, Philip Massinger, Nathan Field, “The Queene of Corinth”, in Comedies and Tragedies […], London: […] Humphrey Robinson, […], and for Humphrey Moseley […], published 1647, Act I, scene ii, page 4, column 1