ثلاثٌ مَن أتى اللّهَ بواحِدَةٍ مِنْهنَّ أوْجَبَ اللّهُ لَهُ الجَنّةَ: الإنْفاقُ مِن إقْتارٍ، و البِشْرُ لِجَميعِ العالَمِ، وَ الإنْصافُ مِن نَفْسِهِ.
Imam Ja‘far al-Ṣadiq (as):
There are three things which if a person performs even one, Allah will make Paradise incumbent upon him: to give charity when one is needy oneself, cheerfulness with the whole world, and being just in spite of one's self.
Source:
al-Kāfī
Vol2
P103
ID: 185