Parallel
Proverbs 26:11
Swete's Septuagint · Berean Standard Bible
ὥσπερ κύων ὅταν ἐπέλθῃ ἐπὶ τὸν ἑαυτοῦ ἔμετον καὶ μισητὸς γένηται, οὕτως ἄφρων τῇ ἑαυτοῦ κακίᾳ ἀναστρέψας ἐπὶ τὴν ἑαυτοῦ ἁμαρτίαν.
As a dog returns to its vomit (note: Cited in 2 Peter 2:22), so a fool repeats his folly.