Practice not being too literal # 10
As my title says, I am trying to learn to not be literal in translations, so every day I will post a saying in English and ask for suggestions as to how to convey the thought in Spanish. At the end of the day, I will pick the answer that I think most accurately reflects the idea, and I will choose it as best answer for 20 points to the respondent.
Today's phrase is "People who live in glass houses shouldn't throw stones."
Good luck!
6 Answers
El que esté libre de pecado, que tire la primera piedra.
Who is free from sin, throw the first stone. (Bible)
Otra opción:
No escupas al cielo porque te puede caer en la cara. :O
Do not spit to the sky because it can fall on your face.
"People who live in glass houses shouldn't throw stones."
No debes hablar de otros cuando no eres perfecto.

It is easy to see speck in your neighbor's eye, when you yourself fail to see the plank in your own eye. Es fácil ver la speci en ojo de su vecino cuando usted youself deja de ver el tablón en su propio ojo.
It seems to me something of a restatement of the Golden Rule
Hagas contra otros como ellos hagan contra ti.
No te metas en los asuntos de otros.
Juliss is the winner for the day for the selection below. He countered my English saying with a Spanish one which is what we are looking for. Good job!
No escupas al cielo porque te puede caer en la cara.