A’mash narrates that the Prophet Muhammad (peace and blessings be upon him) said: There should be calmness and dignity (and composure) in everything, except for matters of the Hereafter.
It is narrated from Sayyiduna Anas bin Malik, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: "Calmness and gentleness are from Allah Almighty, and haste and recklessness are from Satan."