VERSE of Companion in Cave: If you do not aid the Prophet - Allah has already aided him when those who disbelieved had driven him out [of Makkah] as one of two, when they were in the cave and he said to his companion, "Do not grieve; indeed Allah is with us." And Allah sent down his tranquillity upon him and supported him with angels you did not see and made the word of those who disbelieved the lowest, while the word of Allah - that is the highest. And Allah is Exalted in Might and Wise. (9:40) Sura Tawba starts with the following verses: [This is a declaration of] disassociation, from Allah and His Messenger, to those with whom you had made a treaty among the polytheists. (9:1) So travel freely, [O disbelievers], throughout the land [during] four months but know that you cannot cause failure to Allah and that Allah will disgrace the disbelievers. (9:2) Also, Sura Tawba has one particular feature that the verse of Bismillah is even not recited before it. Why this verse of Companion of Cave has been placed under Sura Tawba?