Is it prescribed to fast so that Allah will meet his needs?

Praise
be to Allah.

Fasting in order to have one’s needs met is an innovation for
which there is no basis. Rather what a person must do is seek to draw closer
to Allah by doing naafil (supererogatory) acts of worship, in obedience to
Allah and seeking His reward, doing that sincerely for the sake of Allah
alone, not for the sake of worldly gains. What is proven from the Prophet
(blessings and peace of Allah be upon him) is that among those whose
supplication is not rejected is the one who fasts, until he breaks his fast,
because among those whose supplication will not be rejected is the fasting
person until he breaks his fast. And for the fasting person when he breaks
his fast, there is a supplication which will not be rejected. 

And Allah is the source of strength. May Allah send blessings
and peace upon our Prophet Muhammad and his family and companions. End
quote. 

Standing Committee for Academic Research and Issuing Fatwas 

Shaykh ‘Abd al-‘Azeez ibn ‘Abdullah ibn Baaz, Shaykh Saalih
al-Fawzaanm Shaykh Bakr Abu Zayd.