Arabic text
عن جُبَير بن مُطْعِم رضي الله عنه أنه سمع النبي صلى الله عليه وسلم يقول: «لَا يَدْخُلُ الْجَنَّةَ قَاطِعُ رَحِمٍ».
Translation
Jubayr ibn Mut‘im (may Allah be pleased with him) reported: I heard the Prophet (may Allah's peace and blessings be upon him) say: "The one who severs the ties of kinship will not enter Paradise."
Explanation
The Prophet (may Allah's peace and blessings be upon him) informs that he who withholds from his relatives the rights due to them or harms them and does wrong to them is worthy of not entering Paradise.
Source: HadeethEnc.com