can you please clarify who is this question addressed to? and who denied this? which concept? your previous statement? who should do tawbah? we all should ask for guidance, but i still find this ambiguous - who are you referring to?
Are you people denying that Nubuwwah can come in a later part of a human life of a chosen Nabi as done on Yawm Mithaq? That this concept is a part of Ahlus Sunnah? Or should such a person do Tawbah? And ask for his guidance?