Abu Huraira reported Allah's Messenger (ﷺ) as saying
The gates of Paradise are not opened but on two days , Monday and Thursday. and then every servant (of Allah) is granted pardon who does not associate anything with Allah except the person in whose (heart) there is rancour against his brother. And it would be said : Look towards both of them until there is reconciliation ; look toward both of them until there is reconciliation ; look towards both of them until there is reconciliation.