📝 Subtle and obvious signs that a person may be intensely jealous of you regardless of their age through chatting and social media:
1] Although they claim to be educated and frequently capitalize the first letter of other individuals' names while chatting or commenting on posts, you notice an absurd pattern in them consistently misspelling your name (even though your correctly spelled name may be evident in your username) or typing it incorrectly all too often, as though they're desperate to show disrespect in any way to alleviate their unpleasant feelings of jealousy towards you and your blessings.
2] While they regularly try to answer other Muslims' salaams online or on chat groups, they seem to be obnoxiously consistent in answering your messages or posts without responding to your salaams. Intentionally ignoring your greetings online and face to face may be their strange coping mechanism with debilitating feelings of extreme envy.
3] If they're part of a chat group which you're a member of, they are consistently nonreactive or silent whenever you share some beneficial content or ask questions. However, as soon as you make a mistake or forward certain misinformation, they excitedly point out your errors, publicly scold or criticize you in the main body of the group chat instead of correcting or advising you one-on-one, and they do this a lot. Envious people would do whatever they can to upset you to enjoy a temporary feeling of "superiority".
4] On a regular basis they deliberately leave you out when tagging a number of users (on some of their status updates or while conversing in a chat group) who are your mutual acquaintances and you all were active participants in the same activity, despite being fully aware of your account and presence in the group conversation.
5] You've never received a single compliment or congratulatory message from them whenever you shared joyful moments or uplifting news, in spite of them being "connected" with you on social media, and if ever you express gratitude to Allah Subhaanahu wa Ta'aala or display any form of joy for an achievement, you've heard them say something like "you're just lucky", "good for you. I'm so jealous of you now", "jeez, why are you such a show-off?", "stop being narcissistic" or "whatever".
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📖 Abu Huraira RadhiAllahu 'anhu narrated: Allah's noble Messenger Muhammad SallAllahu 'alaihi wa sallam said, "Beware of envy, for it erases good deeds just as fire devours wood or grass."
Source: Sunan Abī Dāwūd 4903
Grade: Sahih (Authentic) according to Al-Suyuti
📖 Anas Ibn Malik RadhiAllahu 'anhu narrated: Allah's noble Messenger Muhammad SallAllahu 'alaihi wa sallam said, "Envy consumes good deeds just as fire burns wood. Charity (Sadaqah) extinguishes sinful deeds just as water extinguishes fire. Prayer is the light of the believer and fasting is his shield from the Hellfire."
Source: Sunan Ibn Mājah 4210
Grade: Hasan (Fair) according to Ibn Asakir
📖 Abu Huraira RadhiAllahu 'anhu narrated: Allah's noble Messenger Muhammad SallAllahu 'alaihi wa sallam said, "Beware of suspicion, for suspicion is the most false of tales. Do not seek out faults, do not spy on each other, do not contend with each other, do not envy each other, do not hate each other, and do not turn away from each other. Rather, be servants of Allah as brothers."
Source: Sahih Al-Bukhari 5719
Sahih Muslim 2563
Grade: Muttafaqun Alayhi (Authenticity agreed upon) according to Al-Bukhari and Muslim