A. Yusuf Ali:Translation:
And those who launch a charge against chaste
women, and produce not four witnesses (to support
their allegations),- flog them with eighty stripes; and
reject their evidence 2958 ever after: for such men
are wicked transgressors;-

Muhammad Asad:Translation:
And as for those who accuse chaste women [of adultery], 6 and then are unable to produce four witnesses [in support of their accusation], flog them with eighty stripes 7 and ever after refuse to accept from them any testimony - since it is they, they that are truly depraved!
2958 The most serious notice is taken of people who put forward slanders or scandalous suggestions about women without adequate evidence. If anything is said against a woman's chastity, it should be supported by evidence twice as strong as would ordinarily be required for business transactions, or even in murder cases. That is, four witnesses would be required instead of two. Failing such preponderating evidence, the slanderer should himself be treated as a wicked transgressor and punished with eighty stripes. Not only would he be subjected to this disgraceful form of punishment, but he would be deprived of the citizen's right of giving evidence in all matters all his life, unless he repents and reforms, in which case he can be readmitted to be a competent witness. (The verse lays down the punishment for slandering "chaste women", which by consensus of opinion also covers slandering chaste men. Chaste women have been specially mentioned, according to Commentators, because slandering them is more abhorrent. (Eds.) (Cf. n. 662).