Answer

In Jain practice, there is no universal rule that one must always change inner clothes before doing Samayik.

However, for Samayik, one should be as clean, modest, and mentally prepared as possible. If the inner clothes are unclean, sweaty, or worn during activities that caused impurity, then it is better to change them before Samayik.

Explanation

Samayik is a sacred practice of equanimity, purity, and self-discipline. Before Samayik, Jains generally try to maintain:

• Clean body
• Clean clothes
• Clean place
• Pure thoughts
• Respectful attitude

Outer clothes used for Samayik are often kept separate and clean. Inner clothes are also part of bodily cleanliness, so if they are not clean, changing them is appropriate.

But if they are already clean and modest, it is generally acceptable to proceed.

Spiritual Understanding

The main purpose of Samayik is inner purity—reducing attachment, anger, pride, deceit, greed, and worldly thoughts. External cleanliness supports this inner discipline, but it should not become a cause of anxiety or ego.

Takeaway

If inner clothes are clean, you do not necessarily have to change them. If they are unclean or doubtful, it is better to change them before Samayik, with a calm and devotional mind.