Arabic text
عن جابر بن عبد الله رضي الله عنه مرفوعًا: «الزُّبير ابن عَمَّتي، وحَوَاريِّ من أُمَّتي».
Translation
Jābir ibn ‘Abdullāh (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Az-Zubayr is the son of my paternal aunt and a disciple among my followers."
Explanation
The Prophet, may Allah's peace and blessing be upon him, declares that Az-Zubayr ibn al-‘Awwām (may Allah be pleased with him) is the son of his paternal aunt, Ṣafiyyah bint ‘Abd al-Muṭṭalib, (may Allah be pleased with her) and that he is his supporter among his followers.
Source: HadeethEnc.com