Shaykh Zayd al-Madkhali (may Allah have mercy upon him) stated:

The one who is truly a companion is the one who aids his brother according to that which he (the one reminding) is able to do, even if it is with the statement of good. He aids him by way of giving (his brother) the (beneficial) advice (even if that advice goes) against him. When he forgets anything, he reminds him in order that he (i.e. the one reminding) establishes the rights of companionship. (This is) especially in that which is connected to the matters of the religion. He reminds him, advises him and does good to him. All of that is from fulfilling the rights of companionship. As for the one who doesn’t remind you when you forget, and he doesn’t aid you when you are in need of him, (then) indeed he has not established the rights of companionship. That’s because he doesn’t know its status and the status of that which comes as a result of fulfilling (rights of companionship) with the companions (that he have). 

Source: ‘Awnul-Ahad as-Samad Bi Sharh al-Adab al-Mufrad, V.1 pg. 166

Translated by: Abu Yusuf Khaleefah
11th of Dhul Qi’dah, 1435 (6th of September, 2014)
Masjid Nur Allah, LeFrak City, Corona, NYC

Original Arabic

ﻗــــﺎﻝ ﺍﻟﺸﻴﺦ ﺯﻳﺪ ﺍﻟﻤﺪﺧﻠﻲ – ﺭﺣﻤﻪ ﺍﻟﻠﻪ – :
‏( ﺍﻟﺼﺎﺣﺐ ﺑﺤﻖ ﻫﻮ ﺍﻟﺬﻱ ﻳﻌﻴﻦ ﺃﺧﺎﻩ ﺑﻘﺪﺭ ﻣﺎ ﻳﺴﺘﻄﻴﻊ ﻭﻟﻮ ﺑﻜﻠﻤﺔ ﺍﻟﺨﻴﺮ
ﺍﻟﻄﻴﺒﺔ، ﻭﻳﻌﻴﻨﻪ ﺑﺎﻟﻨﺼﻴﺤﺔ ﻋﻠﻰ ﻧﻔﺴﻪ، ﻭﺇﺫﺍ ﻧﺴﻲ ﺷﻴﺌﺎ ﺫﻛﺮﻩ، ﻟﻴﻘﻮﻡ
ﺑﺤﻖ ﺍﻟﺼﺤﺒﺔ ﻻﺳﻴﻤﺎ ﻓﻴﻤﺎ ﻳﺘﻌﻠﻖ ﺑﺄﻣﻮﺭ ﺍﻟﺪﻳﻦ ﻳﺬﻛﺮﻩ ﻭﻳﻨﺼﺢ ﻟﻪ،
ﻭﻳﺴﺪﻱ ﻟﻪ ﺍﻟﻤﻌﺮﻭﻑ، ﻓﻜﻞ ﺫﻟﻚ ﻣﻦ ﺍﻟﻮﻓﺎﺀ ﺑﺎﻟﺼﺤﺒﺔ، ﻭﺃﻣﺎ ﻣﻦ ﺇﺫﺍ
ﻧﺴﻴﺖ ﻟﻢ ﻳﺬﻛﺮﻙ، ﻭﺇﺫﺍ ﺍﺣﺘﺠﺖ ﺇﻟﻴﻪ ﻟﻢ ﻳﻌﻨﻚ؛ ﻓﺈﻧﻪ ﻟﻢ ﻳﻘﻢ ﺑﺤﻖ
ﺍﻟﺼﺤﺒﺔ؛ ﻷﻧﻪ ﻟﻢ ﻳﻌﺮﻑ ﻗﺪﺭﻫﺎ ﻭﻗﺪﺭ ﻣﺎ ﻳﺘﺮﺗﺐ ﻋﻠﻰ ﺍﻟﻮﻓﺎﺀ ﻣﻊ ﺍﻷﺻﺤﺎﺏ .
(ﻋﻮﻥ ﺍﻷﺣﺪ ﺍﻟﺼﻤﺪ ﺑﺸﺮﺡ ﺍﻷﺩﺏ ﺍﻟﻤﻔﺮﺩ ‏( ١٦٦/١ )‏