In Islam, consuming pork is strictly prohibited and considered a major sin. However, if a Muslim consumes pork by mistake, without knowing it contains pork, there are differing opinions among Islamic scholars on the consequences.

1. **Unintentional Consumption**: If a Muslim unknowingly consumes pork due to circumstances beyond their control, such as being served pork without their knowledge or mistakenly eating a food item that contains pork, they are generally not considered to be at fault. In such cases, the person is not held accountable for their actions.

2. **Repentance and Forgiveness**: Islamic teachings emphasize the importance of repentance and seeking forgiveness from Allah (God) for unintentional sins. Muslims are encouraged to sincerely repent, ask for forgiveness, and seek guidance to avoid repeating the mistake in the future.

3. **Prayer and Atonement**: Some scholars suggest offering additional prayers and acts of worship as a form of atonement for unintentional sins. This may include performing extra prayers, giving charity, or engaging in acts of kindness towards others.

4. **Education and Awareness**: It is also important for Muslims to educate themselves about Islamic dietary laws and be vigilant when consuming food to avoid inadvertently consuming prohibited items like pork. Increasing awareness and being mindful of food ingredients can help prevent unintentional mistakes in the future.

Overall, while consuming pork is considered a serious offense in Islam, unintentional consumption is generally viewed with understanding and compassion. Muslims are encouraged to seek forgiveness, learn from their mistakes, and strive to adhere to Islamic dietary guidelines in the future.