nadu

a slave kneels with her thighs spread wide, resting her bottom on ankles, her back is arched, chest forward, her head held high and her eyes lowered, she lays her hands palms up on thighs

an example

softly a girl melts at Your feet, her knees kiss and caress Your furs as they naturally spread and open wide revealling a girl's treasure glistening with honey, she holds her head high but keeps her eyes lowered in submission, firm rounded cheeks rest upon soft heels as a girl seductively arches her back, uplifting generous globes, warm soft palms are placed upwards on silken thighs

quotes

"Nadu!" he snapped. She swiftly turned, facing him, and dropped to her knees. She knelt back on her heels, her back straight, her hands on her thighs, her head up, her knees wide. It was the position of the pleasure slave."
Explorers of Gor page 77

He suddenly snapped his fingers and, in the swift double gesture of the Gorean Master, pointed to a place on the dirt floor before him, almost simultaneously turning his hand, spreading the first and index fingers, pointing downwards. I fled to him and knelt before him, my knees in the dirt, in the position of the pleasure slave, my head down, trembling."
Captive of Gor page 143

"She knelt back on her heels, her back straight, her head up, her hands on her thighs. She knelt in the position of the house slave. I looked at her sternly. Swiftly, she spread her knees. She knelt now in the position of the pleasure slave, the slave of interest to men."
Fighting Slave of Gor page 346

"Kneel, back on your heels," said the trainer to the dark-haired woman. "Straighten your back, suck in your gut, put your shoulders back, thrust out your breasts, spread your knees, widely, lift your chin, put your hands on your thighs. You are not going to be sold as a tower slave, Lady Tina. You are going to be sold as a pleasure slave."