Like many other novels by Jorge Amado, Home Is the Sailor is set in Bahia, one of the states of Brazil. On the second of July, one of the novel's characters organises a ceremony during which

[trumpet sounds] wake the sun of the second of July, which—as the famous song claims—"on this day is Brazilian and shines brighter than on the first day of creation".

(I have no access to the Portuguese text or an English translation; the above quote is translated into English from the German translation by Curt Meyer-Clason, published by S. Fischer in 2013.)

The second of July is the day on which Bahia commemorates the end of the Siege of Salvador in 1823, which occurred during the Brazilian War of Independence. (The Independence of Brazil is actually celebrated on 7 September.)

I have not been able to determine which song is meant in the above quote. I could not find a reference to creation in the Brazilian National Anthem, the Brazilian Flag Anthem, the Hino da Independência or the Brazilian Republic Anthem. Apparently, the song is not one of these anthems. What is the famous song referenced in the quote?