Parallel
Proverbs 17:18
Swete's Septuagint · Berean Standard Bible
ἀνὴρ ἄφρων ἐπικροτεῖ καὶ ἐπιχαίρει ἑαυτῷ, ὡς καὶ ὁ ἐγγυώμενος ἐγγύην τῶν ἑαυτοῦ φίλων.
A man lacking judgment strikes hands in pledge and puts up security for his neighbor.