(28) باب الرَّجُلِ عِنْدَهُ الشَّهَادَةُ لاَ يَعْلَمُ بِهَا صَاحِبُهَا
Zaid bin Khalid Al-Juhani said that he heard the Messenger of Allah (ﷺ) say:
"The best of witnesses is the one who gives his testimony before he is asked for it." (RU)
Reference (RU): Sunan Ibn Majah 2364 (RU)
In-book reference (RU): Book 13, Hadith 57 (RU)
English translation (RU): Vol. 3, Book 13, Hadith 2364 (RU)