Γαγγῖτις
From LSJ
ἔκβαλε πρῶτον ἐκ τοῦ ὀφθαλμοῦ σοῦ τὴν δοκόν, καὶ τότε διαβλέψεις ἐκβαλεῖν τὸ κάρφος ἐκ τοῦ ὀφθαλμοῦ τοῦ ἀδελφοῦ σου → first take the plank out of your own eye, and then you will see clearly to remove the speck from your brother's eye
English (LSJ)
or Γαγγῆτις λίθος,
A = Γαγάτης, Str.16.1.24: also Γ. νάρδος, = Γαγγητικὴ νάρδος, Dsc.1.7, Damocr. ap. Gal.13.1057.