[DahkCeles]

https://wowpedia.fandom.com/wiki/API_C_Timer.After

local needTimer = true
local tauntedMobs = {}
 
local function timesUp()
    needTimer = true
    -- do whatever you want with tauntedMobs
end
 
local function onSubEvent(subevent, ...)
    if subevent == "SPELL_AURA_APPLIED" then
         spellId, spellName, spellSchool = select(12, ...)
         if spellName == "Righteous Defense" and Tair_BattleLog_SourceIsPlayer(sourceName) then
              --print("Taunted "..destName)
              table.insert(tauntedMobs, destName)
              if (needTimer) then
                  needTimer = false
                  C_Timer.After(0, timesUp)
              end
         end
    end
end

PS. I'm not sure where 'destName' comes from.