Al-Bara' reported that the Prophet, may Allah bless him and grant him peace, said, "Make the greeting common practice among you and you will be safe."  

عَنِ النَّبِيِّ ﷺ قَالَ أَفْشُوا السَّلامَ تَسْلَمُوا  

Abu Hurayra reported that the Prophet, may Allah bless him and grant him peace, said, "You will not enter the Garden until you believe and you will not believe until you love one another. Shall I tell you something the doing of which will give you love of one another?" "Yes, Messenger of Allah," they replied. The Prophet said, "Make the greeting common practice among you."  

حَدَّثَنَا ابْنُ أَبِي حَازِمٍ وَالْقَعْنَبِيُّ عَنْ عَبْدِ الْعَزِيزِ عَنِ الْعَلاَءِ عَنْ أَبِيهِ عَنْ أَبِي هُرَيْرَةَ عَنِ النَّبِيِّ ﷺ قَالَ لاَ تَدْخُلُوا الْجَنَّةَ حَتَّى تُؤْمِنُوا وَلاَ تُؤْمِنُوا حَتَّى تَحَابُّوا أَلاَ أَدُلُّكُمْ عَلَى مَا تَحَابُّونَ بِهِ؟ قَالُوا بَلَى يَا رَسُولَ اللهِ قَالَ أَفْشُوا السَّلامَ بَيْنَكُمْ  

'Abdullah ibn 'Amr reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "Worship the All-Merciful and feed people. Make the greeting common practice among you and you will enter the Garden."  

قَالَ رَسُولُ اللهِ ﷺ اعْبُدُوا الرَّحْمَنَ وَأَطْعِمُوا الطَّعَامَ وَأَفْشُوا السَّلاَمَ تَدْخُلُوا الْجِنَانَ