Making a promise/vow without saying it verbally
Q:
1. If a person promises something to Allah without verbally uttering it, is the promise binding? If he/she does not fulfill the promise will he/she be sinning?
2. If someone says to Allah that I will do such and such, but he/she did not say the word ‘promise’ to Allah and nor did he/she use the word ‘vow’ or ‘oath’. In this case, if the person does not do such and such action, will he/she be sinning?