First, Allah says that He revealed to Moses and his brother...
First, Allah says that He revealed to Moses and his brother that his nation should build houses in the land of Egypt. Particularly, they were to build these houses next to one another and facing them. The verse says: " And We revealed to Moses and his brother, saying: 'Provide houses for your people in Egypt, make your houses into places of worship, ..." Then, they were to pay proper attention to spiritual self- actualization through regular prayers, thus purifying and strengthening themselves.
The verse says: "... and keep up prayer: ..." In order to remove the effects of fear and terror from their hearts, and thus regain their spiritual and revolutionary power, He orders them to give these tidings to the faithful, as to their eventual victory, and the bestowal of Allah's favour and grace upon them. The verse continues saying: "... and give glad tidings to the believers'.
Destroy their wealth, and harden their hearts, so they will not believe until they see the painful penalty'. " Commentary : The Qur'an then refers to one of the reasons for the rebellion of the Pharaoh and his adherents, by mentioning the statement of Moses to his Lord where he talks about the wealth and luxury that Pharaoh and his followers had in the world. This wealth and luxury had the effect of seducing the people away from the true Path. The verse says: " And Moses said: 'Our Lord!
Verily You have given to Pharaoh and his chiefs adornment and wealth in the life of this world, Our Lord! so that they mislead(men)from Your Path. ..." Thus Moses(a.s.)asked Allah to destroy their belongings so that they could not benefit from them, and to take their power away from them that they might be able to reflect and meditate upon the reality of existence. The verse says: "... Our Lord!
Destroy their wealth, and harden their hearts, ..." By losing these two capitals, they would quickly degenerate and move a step closer to annihilation, thus making it more possible for the Children of Israel to inflict the last blow upon them.