Hadith: If you are as you say, then it is as if you are feeding them hot ashes, and you will continue to have a supporter against them from Allah as long as you continue to do this

عَنْ أَبِي هُرَيْرَةَ رضي الله عنه:
أَنَّ رَجُلًا قَالَ: يَا رَسُولَ اللهِ إِنَّ لِي قَرَابَةً أَصِلُهُمْ وَيَقْطَعُونِي، وَأُحْسِنُ إِلَيْهِمْ وَيُسِيئُونَ إِلَيَّ، وَأَحْلُمُ عَنْهُمْ وَيَجْهَلُونَ عَلَيَّ، فَقَالَ: «لَئِنْ كُنْتَ كَمَا قُلْتَ، فَكَأَنَّمَا تُسِفُّهُمُ الْمَلَّ وَلَا يَزَالُ مَعَكَ مِنَ اللهِ ظَهِيرٌ عَلَيْهِمْ مَا دُمْتَ عَلَى ذَلِكَ».
[صحيح] - [رواه مسلم] - [صحيح مسلم: 2558]

Abu Hurayrah (may Allah be pleased with him) reported:
A man said: O Messenger of Allah, I have relatives with whom I maintain kinship ties, but they sever them with me; I treat them kindly, but they mistreat me; I tolerate them, but they are intolerant with me. He said: "If you are as you say, then it is as if you are feeding them hot ashes, and you will continue to have a supporter against them from Allah as long as you continue to do this."
[Authentic hadith] - [Narrated by Muslim] - [Sahih Muslim - 2558]

Explanation

A man complained to the Prophet (may Allah's peace and blessings be upon him) about his relatives and kins and how he treats them kindly, but they treat him in the opposite manner. He maintains kinship ties with them and visits them, but they sever ties with him. He shows them kindness and loyalty, but they treat him unfairly and roughly. He tolerates and pardons them, but they are intolerant towards him, and this shows in their bad words and actions. Should he continue maintaining kinship ties with them despite what is mentioned?
The Prophet (may Allah's peace and blessings be upon him) said to him: If the case is the way you mentioned, then you disgrace and degrade them before their own selves as if you are feeding them hot ashes, given your abundant kindness and their hideous way of acting. You will continue to have a supporter against them from Allah that wards off their harm as long as you continue to be kind to them as mentioned and as long as they keep treating you badly.