Arabic text
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ: «مِنْ حُسْنِ إِسْلَامِ المَرْءِ تَرْكُهُ مَا لَا يَعْنِيهِ».
Translation
Abu Hurayrah (may Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said: "Part of a person's excellence in Islam is his leaving what does not concern him."
Explanation
The Prophet (ﷺ) clarified that part of the perfection and beauty of a Muslim's Islam, and the completeness of his faith, is keeping away from what does not concern him, and what does not pertain to him, what does not benefit him of words and deeds, or matters of religion and worldly life that are of no relevance to him. Being preoccupied with what does not concern a person may distract him from what truly does, or may lead him to what he must avoid. For indeed, a person will be held accountable for his deeds on the Day of Judgment.
Source: HadeethEnc.com