1. He was sleeping with his wife kniting beside him.

2. He was sleeping and his wife was knitting beside him.
3. He was sleeping with his mouth open.
4. He was sleeping with his arms crossed.
5. He was sleeping with his legs up.
6. He was sleeping with his hands in his pockets.
7. He was sleeping with his son playing in the living room.
8. He was sleeping with his mouth full.
9. He was sleeping with his wife washing the dishes.
[Would you check the sentences? Are they all grammatical? Correct some errors, please. Thank you.]

1. (sp) knitting

All the others are fine, and some are rather funny! I hope you intended humor! =)

1. He was sleeping with his wife knitting beside him. [Grammatically correct]

2. He was sleeping, and his wife was knitting beside him. [Added a comma for clarity]
3. He was sleeping with his mouth open. [Grammatically correct]
4. He was sleeping with his arms crossed. [Grammatically correct]
5. He was sleeping with his legs up. [Grammatically correct]
6. He was sleeping with his hands in his pockets. [Grammatically correct]
7. He was sleeping while his son played in the living room. [Changed "with" to "while" for better clarity]
8. He was sleeping with his mouth full. [Grammatically correct]
9. He was sleeping while his wife washed the dishes. [Changed "with" to "while" for better clarity]

All the sentences have been corrected for grammatical accuracy and clarity.