The Prophet (peace and blessings be upon him) said:
"Indeed, every prophet has a disciple (a special and sincere helper), and my disciple is al-Zubayr (bin al-Awwam, may Allah be pleased with him)."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 2155
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[خ ت] عن جابر [ت ك] عن علي. مختصر مسلم ١٦٤٣ نحوه.