Tasbeeh

It is permissable but the reward as stipulated will not be received. Yes, the reward for mentioning Allaah's name will be definelty obtained. One should in fact at all times remember Allaah in abundance. However, to recite what you have stated does not take more than a minute so this person must be in a super emergency not ot sit and read it. Make a minute sacrifice. Allaah will reward.