From a Jain perspective, both actions can generate punya (spiritual merit), and which yields more depends on intention and inner attitude.

• Fasting (upavasa) is a form of tapas vrata. When done with right intention— self-control, non-violence, detachment, and aim for spiritual progress—it purifies the mind and earns punya through disciplined effort and restraint.

• Taking care of a fasting person (seva/ seva-karya) is selfless service. Providing care with compassion, non-violence, humility, and without ego also earns punya because it reduces suffering and reflects true goodwill (maitri and ahimsa).

There is no hard rule that one is always greater than the other. If both acts are performed with pure intention and in harmony with Jain ethical principles, both can yield substantial merit. The key is: pure intention (bhavna), non-violence, and the aim of spiritual upliftment.