Seeking something is a metaphor for working hard for something. The abstract noun "welfare" can be translated as a phrase with the verb "prosper" or the adjective "secure." AT: "He worked hard so his people would prosper" or "He worked hard so his people would be secure" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-abstractnouns]])
# he spoke for the peace of all his people
"he represented his people so that they might have peace"