Silsilah as-Sahihah 245 — Consequence of impatience... consequence

Sayyiduna Jundub bin Abdullah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: "There was a man among those before you who was wounded and could not bear the pain of his wound, so he took a knife and cut his hand. The blood kept flowing until he died. Allah the Exalted said: My servant hastened in the matter of his soul before Me, so I have made Paradise forbidden for him."

Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings of Allah be upon him) said: "It is disbelief that a person claims a lineage which he himself does not recognize, or denies any part of (his) lineage, even if it is insignificant."