en_tn/1ki/20/09.md

this second demand

AT: "what you have demanded the second time" (See: rc://en/ta/man/translate/figs-abstractnouns)

May the gods do so to me and more also

See how you translated this in 1 Kings 19:1.

if even the ashes of Samaria will be enough for all the people who follow me to have a handful each

Benhadad is saying that his army will totally destroy everything in Samaria. See: rc://en/ta/man/translate/figs-metaphor)