app/views/devise/passwords/edit.html.erb
<h2>Change your password</h2>
<%= form_for(resource, :as => resource_name, :url => password_path(resource_name), :html => { :method => :put }) do |f| %>
<%= devise_error_messages! %>
<%= f.hidden_field :reset_password_token %>
<p><%= f.label :password, "New password" %><br />
<%= f.password_field :password %></p>
<p><%= f.label :password_confirmation, "Confirm new password" %><br />
<%= f.password_field :password_confirmation %></p>
<p><%= f.submit "Change my password" %></p>
<% end %>
<%= render :partial => "devise/shared/links" %>