Hippuris vulgaris
From LSJ
ὁ λόγος τοῦ Θεοῦ οὐ δέδεται → the word of God will not be dishonoured, the word of God will not be dishonored
Wikipedia EN
Hippuris vulgaris (from Greek: ἵππος – horse and οὐρά – tail), known as mare's-tail or common mare's-tail, is a common aquatic plant of Eurasia and North America ranging from Greenland to the Tibetan Plateau to Arizona. It prefers non-acidic waters.