مِنْ أَجْلِ ذَلِکَ کَتَبْنَا عَلَی بَنِیْ إِسْرَاءِیْلَ أَنَّہُ مَن قَتَلَ نَفْساً بِغَیْرِ نَفْسٍ أَوْ فَسَادٍ فِیْ الأَرْضِ فَکَأَنَّمَا قَتَلَ
النَّاسَ جَمِیْعاً وَمَنْ أَحْیَاہَا فَکَأَنَّمَا أَحْیَا النَّاسَ جَمِیْعاً وَلَقَدْ جَاء تْہُمْ رُسُلُنَا بِالبَیِّنَاتِ ثُمَّ إِنَّ کَثِیْراً مِّنْہُم بَعْدَ
ذَلِکَ فِیْ الأَرْضِ لَمُسْرِفُونَ

(Al Quran, Chapter: Maida, Verse:32)

Because of that reason, We ordained for the Children of Israel that if anyone killed a person, unless it be as a punishment for murder or spreading mischief in the society, it would be as if he killed all people; and if anyone saved a life, it would be as if he saved the life of all people.

یَا أَیُّہَا الَّذِیْنَ آمَنُوا لَا یَسْخَرْ قَومٌ مِّن قَوْمٍ عَسَی أَن یَکُونُوا خَیْراً مِّنْہُمْ وَلَا نِسَاء مِّن نِّسَاء عَسَی أَن یَکُنَّ خَیْراً مِّنْہُنَّ وَلَا تَلْمِزُوا أَنفُسَکُمْ وَلَا تَنَابَزُوا بِالْأَلْقَابِ بءْسَ الاِسْمُ الْفُسُوقُ بَعْدَ الْإِیْمَانِ وَمَن لَّمْ یَتُبْ فَأُوْلَءِکَ ہُمُ الظَّالِمُونَ – یَا أَیُّہَا الَّذِیْنَ آمَنُوا اجْتَنِبُوا کَثِیْراً مِّنَ الظَّنِّ إِنَّ بَعْضَ الظَّنِّ إِثْمٌ وَلَا تَجَسَّسُوا وَلَا یَغْتَب بَّعْضُکُم بَعْضاً أَیُحِبُّ أَحَدُکُمْ أَن یَأْکُلَ لَحْمَ أَخِیْہِ مَیْتاً فَکَرِہْتُمُوہُ وَاتَّقُوا اللَّہَ إِنَّ اللَّہَ تَوَّابٌ رَّحِیْمٌ – یَا أَیُّہَا النَّاسُ إِنَّا خَلَقْنَاکُم مِّن ذَکَرٍ وَأُنثَی وَجَعَلْنَاکُمْ شُعُوباً وَقَبَاءِلَ لِتَعَارَفُوا إِنَّ أَکْرَمَکُمْ عِندَ اللَّہِ أَتْقَاکُمْ إِنَّ اللَّہَ عَلِیْمٌ خَبِیْرٌ

(Al Quran, Chapter: Hujuraat, Verses: 10,11,12)

O you who have believed, let not a people ridicule [another] people; perhaps they may be better than them; nor let women ridicule [other] women; perhaps they may be better than them. And do not insult one another and do not call each other by [offensive] nicknames. Wretched is the name of disobedience after [one’s] faith. And whoever does not repent – then it is those who are the wrongdoers.O you who have believed, avoid much [negative] assumption. Indeed, some assumption is sin. And do not spy or backbite each other. Would one of you like to eat the flesh of his brother when dead? You would detest it. And fear Allah ; indeed, Allah is Accepting of repentance and Merciful. O mankind, indeed We have created you from male and female and made you peoples and tribes that you may know one another. Indeed, the most noble of you in the sight of Allah is the most righteous of you. Indeed, Allah is Knowing and Acquainted.

لَیْسَ لَہَا مِن دُونِ اللَّہِ کَاشِفَۃٌ

(Holy Quran, Chapter: Najm, Verse:58)

“No one besides ALLAH can rescue a soul from hardship ” Quran 53:58

The Prophet Said: “Beware! Whosoever oppresses a Muahid (i.g. Non-Muslim living Muslim land with agreement) or snatches (any of) his rights or cause him pain which he cannot bear, or takes anything from him without his permission, then”I WILL FIGHT AGAINST SUCH A (MUSLIM) ON THE DAY OF JUDGEMENT.”
[Sunnan Abu Dawud, Hadith No. 3052]

Prophet Muhammad (Peace be upon him) said that Allah, the Exalted is saying: O’ Children of Adam, if your sins pile up to sky, then you ask my forgiveness, if this forgive your all sins and I do not care. (Tirmidhi, Hadith No:3680)

Prophet Muhamamd (Peace be upon him) said: One who embraces Islam his/her all sins will go away.
(Muslim, Hadith No:280)

Prophet Muhammad (Peace be upon him said)

The greatest jihad is to battle your own soul to fight the evil within yourself.  (Kanzul Ummal, Hadith No: 11779)