Sayyidah Aishah (may Allah be pleased with her) said: "When Sawdah bint Zam'ah (may Allah be pleased with her) grew old, she gifted her turn to Aishah (may Allah be pleased with her), so the Prophet (peace and blessings be upon him) used to allot Sawdah's turn to Aishah (may Allah be pleased with her) as well."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 20455