﴿وَرَهْبَانِيَّةً ابتَدَعُوهَا﴾
(But the monasticism which they invented for themselves,) refers to the monasticism that the Christian nation invented,
﴿مَا كَتَبْنَـهَا عَلَيْهِمْ﴾
(We did not prescribe for them) `We -- Allah -- did not ordain it for them, but they chose it on their own.' There are two opinions about the meaning of,
﴿إِلاَّ ابْتِغَآءَ رِضْوَنِ اللَّهِ﴾
(only to please Allah therewith,) The first is that they wanted to please Allah by inventing monasticism. Sa`id bin Jubayr and Qatadah said this. The second meaning is: "We did not ordain them to practice that but, rather, We ordained them only to seek what pleases Allah.'' Allah's statement,
﴿فَمَا رَعَوْهَا حَقَّ رِعَايَتِهَا﴾
(but that they did not observe it with the right observance.) meaning, they did not abide by what they ordered themselves to do. This Ayah criticizes them in two ways: first, they invented in things in their religion, things which Allah did not legislate for them. The second is that they did not fulfill the requirements of what they themselves invented and which they claimed was a means of drawing near to Allah, the Exalted and Most Honored. GIbn Jarir and Abu `Abdur-Rahman An-Nasa'i -- and this is his wording - recorded that Ibn `Abbas said, "There were kings after `Isa who changed the Tawrah and the Injil when there were still believers who recited Tawrah and the Injil. Their kings were told, `We were never confronted by more severe criticism and abuse than of these people.' -- they recite the Ayah,
﴿وَمَن لَّمْ يَحْكُم بِمَآ أَنزَلَ اللَّهُ فَأُوْلَـئِكَ هُمُ الْكَـفِرُونَ﴾
(And whosoever does not judge by what Allah has revealed, such are the disbelievers.)(5:44), as well as, they accuse us of short comings in our actions, while still they recite. Therefore, summon them and let them recite these Ayat our way and believe in them our way.' The king summoned them and gathered them and threatened them with death if they did not revert from reciting the original Tawrah and Injil to using the corrupted version only. They said, `Why do you want us to do that, let us be.' Some of them said, `Build a narrow elevated tower for us and let us ascend it, and then give us the means to elevate food and drink to us. This way, you will save yourselves from hearing us.' Another group among them said, `Let us go about in the land and eat and drink like beasts do, and if you find us in your own land, then kill us.' Another group among them said, `Build homes (monasteries) for us in the deserts and secluded areas, where we can dig wells and plant vegetables. Then, we will not refute you and will not even pass by you.' These groups said this, even though they all had supporters among their tribes. It is about this that Allah the Exalted and Most Honored sent down this Ayah,