True friendship in adversity, absence, and death
Nahj al-Balāgha|Volume 1|Book 3|Chapter 134
١٣٤. وَقَالَ (عليه السلام): لَا يَكُونُ الصَّدِيقُ صَدِيقاً حَتَّى يَحْفَظَ أَخَاهُ فِى ثَلَاثٍ فِى نَكْبَتِهِ وَغَيْبَتِهِ وَوَفَاتِهِ.
134. Amīr al-mu’minīn, peace be upon him, said: A friend is not a friend unless he affords protection to his comrade on three occasions: in his adversity, in his absence and at his death.