On the authority of Sa'd, (may Allah be pleased with him) who said, "The Messenger of Allah (pbuh) said, "Paradise is forbidden to whoever falsely claims someone is his father, knowing he is not.”1

On the authority of Abu Hurairah (may Allah be pleased with him) who said, "The Prophet (pbuh) said, "Do not wish for fathers other than your own. For someone to wish for a different father is unbelief.”2

In another narration, it is reported, "Whoever claims someone, other than his own to be his father, or belonging himself to a ruler other than his own, he will invoke upon himself the curse of Allah, His angels and all people.” 3

On the authority of Abu Dharr who said that, he heard the Prophet (pbuh) as saying, "Whoever claims someone to be his father, knowing he is not, he is a disbeliever, whoever claims something which is not his, is not of us and should anticipate his abode in the Fire, and whoever charges a man with unbelief or an enemy of Allah, he will be the one most deserved of it. "