Nu'man b. Bashir reported that his mother bint Rawaha asked his (Nu'man's) father about donating some gifts from his property to his son. He deferred the matter by one year, and then set forth to do that. She (Nu'man's mother) said: I shall not be pleased unless you call Allah's Messenger ﷺ as witness to what you confer as a gift on your son. (Nu'man said): So father took hold of my hand and I was at that time a boy, and came to Allah's Messenger ﷺ. and said: Allah's Messenger, the mother of this son (of mine), daughter of Rawaha wishes that I should call you witness to what I confer as gift to her son. Allah's Messenger (may pease be upon him) said: Bashir, have you any other son besides this (son of yours)? He said: Yes. He (the Holy Prophet) said: Have you given gifts to all of them like this? He said: #Thereupon he (the Holy Prophet) said: Then call me not as witness, for I cannot be witness to an injustice.
The Prophet's refusal to witness an unjust act shows us how important justice is in Islam; even if something seems small or insignificant, such as a gift given out of favoritism rather than fairness, it still needs to be addressed and corrected so that everyone can benefit from its effects equally. This hadith also serves as a reminder for us not only in our dealings with others but also within ourselves; no matter how much love or affection we may feel for someone else, we must always strive for justice first before anything else so that everyone can benefit from whatever action has been taken without any form of discrimination or bias involved whatsoever.