Narrated by Anas bin Malik (Radhiallaho anho):
I never prayed behind any Imam a prayer lighter and more
perfect than that behind the Prophet (sallallaahu 'alaihi
wasallam) and he (sallallaahu 'alaihi wasallam) used to cut
short the prayer whenever he heard the cries of a child lest
he should put the child's mother to trial.

Bukhari Vol. 1 : No. 676