Adam Clarke on John 9:18

But the Jews did not believe - All the subterfuge they could use was simply to sin against their conscience, by asserting that the man had not been blind; but out of this subterfuge they were soon driven by the testimony of the parents, who, if tried farther on this subject, might have produced as witness, not only the whole neighborhood, but nearly the whole city: for it appears the man got his bread by publicly begging, Joh 9:8.

That he had been blind, and received his sight - This clause is omitted in some MSS., probably because similar words occur immediately after. There is, however, no evidence against it, sufficient to exclude it from the test.