It is narrated from Hazrat Aisha (may Allah be pleased with her) that the son of the Prophet (peace and blessings be upon him), Hazrat Ibrahim (peace be upon him), passed away at the age of eighteen months, but the Prophet (peace and blessings be upon him) did not lead his funeral prayer.
Hadith Referenceمسند احمد / مسند النساء / 26305
Hadith Gradingحکم دارالسلام:إسناده حسن، محمد بن إسحاق مدلس ولكن صرح بالتحديث