Mishkat al-Masabih 3364
Jabir reported the Prophet as saying, “If anyone possesses three characteristics God will give him an easy death and bring him into His paradise:
gentleness towards the weak, affection towards parents, and kindness to slaves.” 

Tirmidhi transmitted it, saying this is a gharib tradition.
وَعَنْ جَابِرٌ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: 
" ثَلَاثٌ مَنْ كُنَّ فِيهِ يَسَّرَ اللَّهُ حَتْفَهُ وَأَدْخَلَهُ جَنَّتَهُ: رِفْقٌ بِالضَّعِيفِ وَشَفَقَةٌ عَلَى الْوَالِدَيْنِ وَإِحْسَانٌ إِلَى الْمَمْلُوكِ ". رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا حَدِيثٌ غَرِيبٌ