Anas ibn Malik (may Allah be pleased with him) narrated that the Prophet (peace be upon him) said: "When I start Salah I intend to prolong it, but on hearing the cries of a child, I cut short the Salah because I know that the cries of the child will incite its mother's passions."
Lessons gained from the Hadith:
1- It contains a proof that the one who starts Salah with the intention of prolonging it may lighten it for a benefit.
2- It shows the Prophet's mercy with his nation, particularly with the weak: Women and children.
3- The great kindness of the Prophet (peace be upon him) who started Salah with an intention then changed his intention as soon as he heard the cry of the child. He was very sensitive and full of love, mercy, and kindness.
 Al Bukhari 709, and Muslim 470.
 Fathul-Bary of Ibn Rajab 4/222.
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