A new Czech translation of the Instruction of Dua-Khety is presented in the article. Two limestone hieratic ostraca with parts of this composition are deposited in the National Museum - Náprstek Museum of Asian, African and American Cultures in Prague, the first one (P 3838) being dated back to the 19th Dynasty, the second one (P 3804) to the 20th Dynasty.
Previously unrecognized ostraca, both coming from Deir el-Medina, are illustrated with photographs, and hieroglyphic transcriptions and translations are provided as well.