Prohibition of Fasting for a lifetime for the one who will be harmed by that or who will neglect other duties, or does not break his fast on the two 'Ids or during the days of At-Tashriq; It is better to fast alternate days Sahih Muslim 1159 e
Translation
'Abdullah b. 'Amr b. al-'As (Allah be pleased with them) reported that the Messenger of Allah (ﷺ) said
'Abdullah, don't be like so and so who observed prayer during the whole night and then abandoned it (altogether).