The Thunder - 13:21 Those who unite what Allah has commanded them to unite, and they honor their Lord and fear the evil Reckoning.
The hearts of the believers are bound together like brothers, like relatives:
The Cow/2:27 Those who, after pledging allegiance to their covenant with Allah, break it, cut off what Allah has commanded to be joined, and make corruption in the earth. They are the losers.

The Family Of Imran/3:103 Hold fast to the rope of Allah, and do not differ. Remember the favor of Allah upon you. When you were enemies, He united your hearts and by His favor you became brothers. You were on the edge of a pit of fire and He saved you from it. This is how Allah explains His verses so that you may be guided.

The Thunder/13:21 Those who unite what Allah has commanded them to unite, and they honor their Lord and fear the evil Reckoning.
The Thunder/13:25 Those who break their covenant after their promise to Allah, those who do not unite what Allah has commanded to be united, and those who make mischief in the earth have deserved the curse and for them is an evil consequence.

Muhammad/47:22 So if you should come to power, you would make corruption in the earth and break the ties of kinship?

Council/42:23 "This is how Allah gives glad tidings to His servants who believe and act righteously. Say, "I do not ask of you any wage except the love of kinship."Whoever does a good deed, We increase his good deed. Allah is the Forgiving, the Appreciative."

The Repentance/9:8 How can it be? If they had prevailed over you, they would have observed neither kinship nor treaty. With their mouths they speak pleasant words to pacify you, but their hearts desire the opposite. Many of them have gone astray.