Premanand Maharaj Ji
What if I feel jealous of someone who does more naam jap than me?
Jealousy of devotees ruins your bhajan
When you see someone doing a lot of naam jap, wish for their charanamrit (sacred water from the feet) and their foot-dust, not jealousy. Jealousy leads to criticism and the loss of your bhajan.
These are devotees of our Bhagwan; welcome, welcome, not jealousy. This is wrong. Give it up. Otherwise this very jealousy will make you start criticising.