Speak good or keep silent
On the authority of Abu Hurayrah (may Allah be pleased with him), that the Messenger of Allah (peace and blessings of Allah be upon him) said:
Let him who believes in Allah and the Last Day speak good, or keep silent; and let him who believes in Allah and the Last Day be generous to his neighbour; and let him who believes in Allah and the Last Day be generous to his guest. [Al-Bukhari] [Muslim]
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه و سلم قَالَ: “مَنْ كَانَ يُؤْمِنُ بِاَللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَصْمُتْ، وَمَنْ كَانَ يُؤْمِنُ بِاَللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمْ جَارَهُ، وَمَنْ كَانَ يُؤْمِنُ بِاَللَّهِ وَالْيَوْمِ الْآخِرِ فَلْيُكْرِمْ ضَيْفَهُ”.
[رَوَاهُ الْبُخَارِيُّ] ، [وَمُسْلِمٌ]
Reference | : Hadith 15, 40 Hadith an-Nawawi |