When they came out of the fort...
When they came out of the fort, Tubba told them: “I like your cities very much and I want to live with you.” They said: “This is not an appropriate place for you because this is the place of migration of the last prophet and until he arrives, no king can take control of this place.” He said: “I will leave some of my relatives here and wish that when that prophet appears they should help him.” Thus he left the tribes of Aws and Khazraj with those people to settle in Medina.
Slowly their population increased much. Finally they overwhelmed the Jews and snatched away their property and wealth etc. The Jews told them: “When (S) will arrive we will also drive you out from our houses snatched by you.” But when the Holy Prophet (S) arrived, the Ansar became Muslim but the Jews turned infidels.
“…and aforetime they used to pray for victory against those who disbelieve, but when there came to them (Prophet) that which recognized, they disbelieved in him; so Allah’s curse is on the unbelievers.” [^2] It is mentioned in another authentic tradition explaining this verse that the same Imam was asked by the people about this and he said that it was a group who lived in a time between Muhammad (S) and Isa (a.s.) which used to threaten idol worshippers that: Very soon a prophet will arrive who will break your idols and deal with you thus and thus.
But when the Holy Prophet (S) arrived, they themselves turned disbelievers. Qutub Rawandi (r.a.) has narrated that when Tubba came to Medina they killed three hundred and fifty Jews and intended to destroy Medina when an old Jew aged two hundred and fifty years told him: “O King! It does not befit a man like you to kill people in a fit of anger and it is not in your power to destroy this city.” “Why?” asked Tubba.
That old man replied: “Because a prophet will be born in Mecca in the progeny of Ismail (a.s.) who will migrate to Medina.” Upon this Tubba stopped killing them and went to Mecca, put a covering on Kaaba and gave food to people over there and also composed a poem which meant: “I testify that Ahmad is the Messenger of Allah Who is the Creator of the entire Universe.