It was narrated from An-Nu'man that his father brought him to the Prophet to bear witness to a present that he gave to him. He said:"Have you given all your children a present like that which you have given to him?" He said: "No." He said: "I will not bear witness to anything. Will it not please you if they were all to treat you with equal respect?" He said: "Of course." He said: "Then no (I will not do it)

English translation · Sunan an-Nasa'i