Islamic family relations concerns both the close family as well as the more distant families. Several hadith

Hadith

The term Hadīth is used to denote a saying or an act or tacit approval or criticism ascribed either validly or invalidly to the Islamic prophet Muhammad....

stress the importance of keeping family relations alive and recommend that even distant relations are to be visited, even if would take a year to travel to them. Brothers and sisters at home should help their mother when she becomes unable to support her children alone. At the same time brothers and sisters should be benevolent to each other. Islam strongly supports this interaction between each other. In Islam, all Muslims are considered brothers and sisters in Islam.

Some hadith state that the person who severs the bond of kinship will not enter Paradise.

Parents

And We have enjoined on man (to be good) to his parents: in travail upon travail did his mother bear him, and in years twain was his weaning: (hear the command), "Show gratitude to Me and to thy parents: to Me is (thy final) Goal. Quran 31:14

Your Lord has decreed that you worship none but Him, and that you be kind to parents. Whether one or both of them attain old age in your life, say not to them a word of contempt, nor repel them, but address them in terms of honour. And, out of kindness, lower to them the wing of humility, and say: My Lord! bestow on them Your Mercy even as they cherished me in childhood. Quran 17:23-34

Narrated by Abu Bakr
that Allah's Messenger said, "Shall I inform you of the biggest of the great sins?" They said, "Yes, O Allah's Messenger!" He said, "To join partners in worship with Allah, and to be undutiful to one's parents." Sahih Bukhari 8.74.290

Husband and Wife

And among His Signs is this, that He created for you mates from among yourselves, that ye may dwell in tranquillity with them, and He has put love and mercy between your (hearts): verily in that are Signs for those who reflect. Quran 30:21

And those who pray, "Our Lord! Grant unto us wives and offspring who will be the comfort of our eyes, and give us (the grace) to lead the righteous." Quran 25:74

Narrated Sa'd bin Abi Waqqas: Allah's Messenger said, "You will be rewarded for whatever you spend for Allah's sake even if it were a morsel which you put in your wife's mouth." Sahih Bukhari 001.002.053

Narrated Al-Aswad: I asked 'Aisha what did the Prophet use to do at home. She replied. "He used to keep himself busy serving his family and when it was time for the prayer, he would get up for prayer." Sahih Bukhari 008.073.065

Children

O you who believe! Save yourselves and your families from a fire whose fuel is men and stones; over it are angels stern and strong, they do not disobey Allah in what He commands them, and do as they are commanded.Quran 66:6

Narrated Abu Huraira: Allah's Messenger kissed Al-Hasan bin Ali while Al-Aqra' bin Habis At-Tamim was sitting beside him. Al-Aqra said, "I have ten children and I have never kissed anyone of them," Allah's Messenger cast a look at him and said, "Whoever is not merciful to others will not be treated mercifully." Sahih Bukhari 008.073.026