The Noble Shaykh Muhammad Ibn Saalih al-‘Uthaymeen (may Allah have mercy upon him) stated:

Those who love each other for the sake of Allah, there’s nothing from the affairs of the worldly life that can cut off their love for the sake of Allah. Indeed they are people who only love (each other) for the sake of Allah, nothing separates them except for death. Even if some of them have made a mistake against the others or have fallen short regarding the rights of others, indeed this does not concern them.

Source: Explanation of Riyaadus Saaliheen, 3/26

Translated by Abu Yusuf Khaleefah
7th of Rajab, 1436 H (04-26-2015)
Masjid Nur Allah, Queens, NYC

Original Arabic

قال الشيخ ابن عثيمين رحمه الله تعالى

المتحابين في الله لا يقطع محبتهم في الله شيء من أمور الدنيا ، وإنما هم متحابون في الله لا يفرقهم إلا الموت، حتى لو أن بعضهم أخطأ على بعض، أو قصَّر في حق بعض ، فإن هذا لا يهمهم 

شرح رياض الصالحين 3/26