How does God prescribe five obligatory prayers of each day ?

 

Verses 78-79 of Chapter 17:
Perform the Salah from midday till the darkness of the night, and recite the Qur'an in the early dawn. Verily, the recitation of the Qur'an in the early dawn is ever witnessed. And in some parts of the night (also) offer the Salah with it as an additional prayer for you. It may be that your Lord will raise you to Maqam Mahmud.

Verse 130 of Chapter 20:
So bear patiently what they say, and glorify the praises of your Lord before the rising of the sun, and before its setting, and during some hours of the night, and at the ends of the day, that you may become pleased with the reward which Allah shall give you.

Verses 17-18 of Chapter 30:
So glorify Allah when it is evening for you, and when it is morning. Praise is only for Him in the heavens and the earth and glorify him in the later part of the afternoon and in the afternoon.

Allah enjoins moderation in spending condemning miserliness and forbidding overspending!

Verses 29-30 of Chapter 17:

And let not your hand be tied (like a miser) to your neck, nor overextend it (like a spendthrift), so that you become blameworthy and in severe poverty. Truly, your Lord expands the provision for whom He wills and straitens (for whom He wills). Verily, He is Ever All-Knower, All-Seer of His servants.

Whoever purposefully commits evil deeds and is thus surrounded by sins are the dwellers of the Fire!

Verse 81 of Chapter 2:

Yes! Whosoever earns evil and his sin has surrounded him, they are dwellers of the Fire (i.e. Hell); they will dwell therein forever.

Why does God not accept His servants' act of associating others with Him?

What do the people who associate others with God accept for Him, but deny for themselves?

Verse 71 of Chapter 16

And Allah honored some of you over others with wealth and properties. Then, those who are so honored will by no means hand over their wealth and properties to those (captives of war) whom their right hands possess, so that they may be equal with them in that. Do they then deny the favor of Allah.