“In the blacksmith's house, wooden knife.”

Referring to a person who does not apply their knowledge, advice, or experience to themselves.

Translation in spanish

“En casa de herrero, cuchillo de palo.”

Referente a una persona que pero no aplica su conocimientos, consejos o experiencia a sí misma.

Phonetic:
/en kah-sah deh ehr-reh-roh, koo-chah-rah deh pah-loh/