vedere la pagliuzza nell'occhio altrui e non vedere la trave nel proprio

Etymology
lit. 'to see the mote in another's eye and not see the beam in one's own'. From the parable of in the Gospel of Matthew, chapter 7, verses 1 to 5. Compare 🇨🇬.

Verb

 * 1) to be quick to criticize others while ignoring one's own, generally greater, defects; people who live in glass houses shouldn't throw stones

Usage notes

 * Subject to many variations, including just using the term's component parts. However, this is the original base form of the verb.