Abu Ishaq (may Allah have mercy on him) said that Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) left instructions: "When I die, Sayyiduna al-Zubayr bin al-Awwam (may Allah be pleased with him) should lead my funeral prayer."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 6899