Need help shooting fireball in direction mouse is pointing at?

local remote = game.ReplicatedStorage.remote


remote.OnServerEvent:Connect(function(plr, Player)
    print("hi")
    local fireBall = game.Workspace.fireball:Clone()
    fireBall.Parent = game.Workspace
    local humr = plr.Character.HumanoidRootPart
    fireBall.CFrame = humr.CFrame

    local mouse = plr:GetMouse()

    fireBall.Anchored = false
    local bVelocity = Instance.new("BodyVelocity",fireBall)
    bVelocity.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
    bVelocity.Velocity = humr.CFrame.lookVector * 200 -- I set velocity here
end)

This is my fireball server code and this currently fires in direction player is looking at

but I want fireball go to mouse direction