You’ve already understood the core point very well: “Yes, this is attachment (raag) to material things like money, and that attachment creates a little envy (irdhya).”

From a Jain view, let’s break it simply:

1. Is it her punya that she got the $50 voucher?

- Yes, getting something pleasant without effort is a result of shubh karma (good punya) from her past. - You getting a pen instead is also your own karma’s result. Both are separate karmic accounts.

1. Is feeling a little envy a big sin?

- The momentary feeling is a form of krodh–maan–maya–lobh (the 4 kashays), here mainly lobh (greed/attachment) and a little maan (ego – “why not me?”). - But you became happy for her too – this is sadbhav (good feeling) and anukampa (kindness). That is very positive and reduces the intensity of the fault.

1. How to reduce this envious behaviour in a Jain way?

Very simple, practical steps:

(a) Change your inner view immediately - Silently think: - “This is her punya, good for her.” - “My punya gave me this pen, I accept it peacefully.” - This thought itself starts destroying the envy-karma.

(b) Practice Mudita – joy in others’ happiness - When someone gets more, train your mind to feel: “May she always get good things. I am truly happy for her.” - Even if you don’t fully feel it at first, keep repeating – slowly the heart changes.

(c) Remember: things are temporary, qualities are permanent - Voucher, money, gifts – all par-dravya (external things), temporary. - Qualities like kindness, contentment, forgiveness, self-control – these go with the soul life after life. - Ask yourself: “What is more valuable: $50 now, or stronger samvar (stopping new karma) for my soul?”

(d) Small pratikraman (inner apology) When you notice envy: - Accept: “Yes, I felt jealous.” - From the heart, say within: “I am sorry for this impure thought. I will try to see all souls with equality.” - This cleans the inner stain.

(e) Practice contentment (santosh) in daily life - Consciously appreciate what you do receive: “I got a pen – I can use it for good things, for study, for dharma.” - Every time you feel “I wish I had more”, add: “…but I am thankful for what I have.”

1. How to notice and stop it earlier next time?

- Watch for the first thought: “Why only she… why not me?” - As soon as you see that thought, replace it with: “Her karma – my karma. I choose peace.” - This quick awareness is Jain dharma in action.

1. Good sign in you

- You felt envy, but you also became happy for her. - You’re questioning yourself and wanting to improve. - This is a very good spiritual sign – awareness and honesty. In Jain dharma, this inner honesty is more important than never making a mistake.

In short:

• Yes, her voucher is her punya.
• Your small envy is a kashay, but you can purify it with awareness, right thinking, genuine happiness for others, and small inner pratikraman.
• Keep reminding yourself: “Objects come and go. My real wealth is a pure, jealousy-free heart.”