Sahih Bukhari, Chapter: Witnesses

My mother asked my father to present me a gift from his property; and he gave it to me after some hesitation. My mother said that she would not be satisfied unless the Prophet (SAW) was made a witness to it. I being a young boy, my father held me by the hand and took me to the Prophet (SAW) . He said to the Prophet (SAW), "His mother, bint Rawaha, requested me to give this boy a gift." The Prophet (SAW) said, "Do you have other sons besides him?" He said, "Yes." The Prophet (SAW) said, "Do not make me a witness for injustice." Narrated Ash-Shabi that the Prophet (SAW) said, "I will not become a witness for injustice."