If one forgets the first tashahhud but remembers it before standing up, what is required of him?

Question : The first case: if he intended to stand up but did not stand? Praise be to Allah.

Answer : All right, that is one case. In that case, he performs the tashahhud and there is no burden on him. The second case: it is obligatory. In the first case, if he began to rise from the first tashahhud and then remembered and remained seated, then in this situation he owes nothing, because he did not add to his prayer nor subtract from it.