In A Lost Lady, when Niel discovers Mrs. Forrester's affair with Frank Ellinger, he "mutter[s], 'Lilies that fester smell far worse than weeds.'" The full final couplet of Sonnet 94 reads: "For sweetest things turn sourest by their deeds;/Lilies that fester smell far worse than weeds" (Scholarly Edition, note 82).
In "Eric Hermannson's Soul," Margaret Elliot's fiance begins a letter to her with an allusion from Sonnet 97: "How like a winter hath thine absence been," changing the first person "my" to "thine," for his purposes.