Dr. Mostafa Zaid provides an informative analysis of this abrogation claim which he supports (volume 2 of
his book, pages 309-315). Here are the highlights:
1. He puts this case in the same category as
58:13 and
73:1-4 in terms of being abrogated using explicit language in the abrogating verse, in this case "Now, God has lightened [the hardship] for you" in 8:66.
2. He asserts that the 10-to-1 obligation was indeed put into practice in the battle of Badr, when Muslims were ordered
not to cut and run in the face of a 3-to-1 adversary ratio.
(emphasis made for later reference)3. He asserts that both verses are commands not statements of fact, defending this view by saying that "lightening the hardship" doesn't fit a statement of fact. Makes sense.
4. He further asserts that the second command of 2-to-1 ratio is not contingent on weakness, which would leave the first command of 10-to-1 ratio in place and make the second one an exception. Rather, Muslims are no longer required to face a 10-to-1 adversary ratio, period. I agree that the wording bears this assertion.
5. He also asserts that both commands were requirements on Muslims, not recommendations. His evidence is the wording of a narration of Ibn Abbas. He uses this to argue the abrogation case based on a requirement being lifted, not just a recommendation or a permission which would make the two verses compatible.
6. He disagrees that the view that the two verses being consecutive in the Quran precludes the possibility of abrogation, based on the fact that contiguity in the text doesn't imply vicinity in the time of revelation. He quotes the narration of Ibn Abbas to imply that there was a time break between the two verses.
7. He says that 8:66 requires being steadfast and
not cutting and running in front of the enemy. He quotes two other verses that address "cutting and running" in the same chapter (notice that the commands in these verses are unconditional):
8. He goes on to strongly criticise a dissenting view, that of the Thaherey Imam Abu-Muhammad Aly Ibn-Hazm. To start with, Ibn-Hazm objects about the basis for abrogation lacking consensus or statement of abrogation. Zaid doesn't address that objection.
9. This where it gets confusing. Ibn Hazm says that there is no abrogation in these verses because staying put after the fight starts is required regardless of the ratio. I am not sure why this would be an argument against abrogation, except perhaps in reinforcing the statement-of-fact argument? Then Zaid comes back and wonders how people could infer that the verse permits cutting and running against a 3-to-1 ratio, since nothing in the verses talks about cutting and running, and also objects to the notion of fighting an unbounded size of the enemy. I have no idea how this is a response to Ibn-Hazm's argument about abrogation, and how it reconciles with what Zaid himself said in the emphasized parts of points 2 and 6 above. The refutation of Ibn-Hazm's dissent continues in a way that didn't make sense either way to me.