Prophet Muhammad (sa) said: “There are four characteristics whoever possesses them is a hypocrite and whoever
possesses some of them has an
element of hypocrisy until he leaves it, when he speaks he lies, when he
promises he breaks his promise, when he disputes/gets in an argument he transgresses/acts
deceitful and when he is given a
trust he does not fulfil it.” (Bukhari and Muslim)
The one who breaks his promises has a characteristic
of a hypocrite.
The believer takes his vows very serious.
= to pledge / swear by Allah /
promise to do a particular thing / to carry out a certain action.
Allah (swt) says in the Qur’aan (in the interpretation of the meaning): "...surely every promise/covenant shall be questioned about."