Hypocrisy is the tribute that vice pays to virtue.

[L’hypocrisie est un hommage que le vice rend à la vertu.]

François VI, duc de La Rochefoucauld (1613-1680) French epigrammatist, memoirist, noble

Réflexions ou sentences et maximes morales [Maxims], ¶ 218 (1665-1678) [tr. FitzGibbon (1957)]
    (Source)

(Source (French)). Alternate translations:

Hypocrisie is a Sort of Homage which Vice pays to Vertue.
[tr. Stanhope (1694), ¶ 219]

Hypocrisy is the homage that vice pays to virtue.
[pub. Donaldson (1783), ¶ 231; ed. Lepoittevin-Lacroix (1797), ¶ 209; ed. Carville (1835), ¶ 449; tr. Bund/Friswell (1871), ¶ 218]

Hypocrisy is the homage that vice renders to virtue.
[ed. Gowens (1851), ¶ 227]

Hypocrisy is a tribute vice pays to virtue.
[tr. Heard (1917), ¶ 223; tr Tancock (1959), ¶ 218]

Hypocrisy is a sort of homage which vice pays to virtue.
[tr. Stevens (1939), ¶ 218]

Hypocrisy is the homage vice offers to virtue.
[tr. Kronenberger (1959), ¶ 218]

Hypocrisy is a form of homage that vice pays to virtue.
[tr. Whichello (2016), ¶ 218]