The ruling on changing the intention from witr to the rawatib of 'Isha'

Question:
His other question, may Allah preserve you, says: I intended to pray the rawatib of 'Isha' at home, but I forgot. When I was praying witr, after the takbir of ihram, I remembered that I had not prayed the rawatib. Is it permissible to change the intention?

Answer:
It is permissible to change the intention from one act of worship to one of equal or lesser status, but it is not permissible to change it to one of higher status. Therefore, one does not change a voluntary prayer into an obligatory one, whereas one may change an obligatory prayer into a voluntary one during the act of worship, and one may change a voluntary prayer into one of equal status. So if you change your intention to make it the rawatib of 'Isha' and then pray witr afterwards, there is no harm in that. Yes.