For example...
For example; although Abu Lahab was the Uncle of the Prophet, his extreme anti-Islamic behaviour made him cursed till the Day of Judgment. Another such statement which leaves no doubt of Imam Hasan's and Husayn's role is, the Prophet of God (S) said "Hasan and Husayn are the masters of youth in Paradise". This was presented as a credential to the Muslim nation in order to hold firm to their leadership.
At a certain time the Muslims in Madina felt the Islamic Message's glory and good results, so they intended to reward the Prophet for his effort in guiding them. The gift they presented to the Prophet (S) was some gold which they had collected. The Prophet’s answer came in the following verses which were revealed during this incident. "Say: 'No reward do I ask of you for this except being kind to those of kin" (23:42).
Al-Kashaaf narrated that when this verse was revealed, people asked the Prophet "O Prophet of God, who are these of kin which this verse makes their respect obligatory upon us?" The Prophet answered, "They are Ali, Fatimah, and their two sons". However, this did not imply disrespect for other Muslims, companions or the rest of kin to him.
Looking objectively at the message of the verse it will indicate first of all reluctance to accept material reward, if a reward was not suitable then it cannot be restricted to the material only. Hence, the verse was indicating respect to some specific people, not because they are his relatives as such, but the real reason behind this respect was to safeguard the Islamic Message. The role they had to play in the Islamic history required such respect in order to enable them to perform their task.
Al-Hakim narrated through Abu Saaid Al-Khidri that the Prophet said, "He who dislikes us, we the family, God will place him in Hell", this implies those who dislike Islamic conduct and life. Jabir narrated that the Prophet in his speech after performing the last pilgrimage, said, "O people I am leaving the book of God and my family (Itrah) for guidance. If you hold fast to them, surely you will never go astray".
This Hadith was narrated through some twenty different sources of trusted chains of narrators, Muslim in his Sahih quoted some of them.