Verily We! it is We Who have revealed unto thee the Qur'an, a gradual revelation. 23 So persevere with the command of your Lord and do not pay any heed to the wicked and the unbelieving, 24 And glorify the name of your Lord morning and evening. 25 Prostrate before Him and glorify Him extensively during the night. 26 Verily those love the herein, and leave in front of them a heavy day. 27 It is We Who creared them and made them firm of make. And whenever We list, We can replace them with others like unto them. 28 Verily this is an admonition; then whosoever will, may choose a way unto his Lord. 29 And you do not will except that Allah wills. Indeed, Allah is ever Knowing and Wise. 30 He is Merciful to whom He will; but, for the harmdoers He has prepared for them a painful punishment. 31