throw stones in a glass house → είπε ο γάιδαρος τον πετεινό κεφάλα, βλέπω το καρφί που υπάρχει στο μάτι του άλλου και δεν βλέπω το δοκάρι που υπάρχει στο δικό μου

[spiros]

throw stones in a glass house → είπε ο γάιδαρος τον πετεινό κεφάλα

To criticize others when one have similar weaknesses oneself.
throw stones in a glass house - Wiktionary

And why beholdest thou the mote that is in thy brother's eye, but considerest not the beam that is in thine own eye?

Why do you see the speck that is in your brother's eye, but don't consider the beam that is in your own eye?
Matthew 7:3 - Wikipedia

τί δὲ βλέπεις τὸ κάρφος τὸ ἐν τῷ ὀφθαλμῷ τοῦ ἀδελφοῦ σου, τὴν δὲ ἐν τῷ σῷ ὀφθαλμῷ δοκὸν οὐ κατανοεῖς; → Why do you look at the speck of sawdust in your brother's eye and pay no attention to the plank in your own eye? (Matthew 7:3)