Kalima-I Shahadah Is a Means of Intercession

Kalima-i Shahadah is a means of intercession (shafaat)
Abu Hurayra says:
“I asked Prophet Muhammad: ‘O Messenger of Allah! Who are the people who will benefit from your intercession and who will be the happiest on the Day of Judgement?’ He responsed:
“Those who will benefit from intercession and who will be happy are those who recite “لاَ اِلهَ اِلاَّ اللّهُ” sincerely.”’ (Bukhari)