pathfinder 1e – Swift casting using a Warpriest’s Fervor, while two-weapon fighting

I am looking at creating a TWF Warpriest for an upcoming campaign and was wondering how the action economy works if I am wielding two kukris but then want to swift cast using Fervor. Am I going to need to have Quick Draw in order to put one weapon away and then redraw it so I have an empty hand for, say, swift casting divine favor, or can I swift cast with both kukris in hand? It would just be a bummer to have to wait until 3rd level to have to pick up Quick Draw due to the 3/4 BAB.