It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that once the Holy Prophet (peace and blessings be upon him) was on a journey. A man cursed his she-camel. The Holy Prophet (peace and blessings be upon him) asked, "Where is the owner of the she-camel?" The man said, "I am present." The Holy Prophet (peace and blessings be upon him) said, "Take this she-camel back, for your words about her have been accepted."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 9522