Halakhah for Kiddushin 153:19

That a high priest not marry a widow: That only a high priest not marry a widow, as it is stated (Leviticus 21:14), "A widow and a divorcee and a profaned woman, a licentious woman - these he shall not take." And the verse did not need to repeat the prohibition of "a divorcee and a profaned woman, a licentious woman" with a high priest - as they were forbidden more generally to any priest, and he is the head of the priests. And therefore, they, may their memory be blessed, explained (Kiddushin 77a), that the repetition of this warning of "a divorcee and a profaned woman, a licentious woman" with a high priest comes to teach us this matter: And they said in the Gemara in Kiddushin that it comes to teach that at a time that it happens that all of these prohibitions happen with one woman in this order - that at first, she is widowed; and afterwards she divorces; and afterwards she is profaned; and afterwards she becomes a licentious woman - and the high priest has intercourse with her, he is liable four [sets] of lashes for one intercourse. And this is when he was warned about [the] four negative commandments. And if a common priest had intercourse with her, he will be lashed three [sets]. And the reason that they are liable for several [sets of] lashes when [her status changed] in this order is because there is a supplementary prohibition in this matter. And [it is] as we wrote above close by in the commandment of the prohibition of a divorcee to a priest (Sefer HaChinukh 268) - that a prohibition does not rest upon [another] prohibition except when it is a supplementary prohibition or [it was] an inclusive prohibition (issur kollel) or [several prohibitions come] at one time, as it is explained in Tractate Keritot 14b. And it is not necessary to say that if he had intercourse with four women and one of them was a widow, one was a divorcee, one was a profaned woman and one was a licentious woman and he was warned about all of them, he is liable for four [sets] of lashes - whether he has intercourse in the order or not in the order - since they are different bodies.