It is narrated from Hazrat Anas (may Allah be pleased with him) that I have not offered a lighter and more complete prayer behind any imam than the Prophet (peace and blessings be upon him). Sometimes, the Prophet (peace and blessings be upon him) would shorten the prayer upon hearing the cry of a child, fearing that its mother might be distressed.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 13523