As for the evidence from the sunnah: it is the hadith of Ibn Abbas, may Allah be pleased with them, narrated by Muslim in his Sahih: “During the lifetime of the Messenger of Allah, peace and blessings be upon him, the caliphate of Abu Bakr, and the first two years of Umar’s caliphate, a threefold divorce counted as one. Then, when people began to pronounce it frequently, Umar, may Allah be pleased with him, said: ‘I see that people have hastened in a matter in which they previously had time for deliberation. What if we enforce it upon them?’ So he enforced it upon them.” (1)
This indicates that enforcing the three pronouncements as three was among Umar’s discretionary rulings, and that he, may Allah be pleased with him, did so as a matter of public policy, not because this was what the evidences required. For if people were held to a threefold divorce, they would refrain from it. When a person knows that, if he says, “You are divorced, you are divorced, you are divorced,” it counts as one, he finds it easy to say it again. But when he knows that, if he says it, he will be separated from his wife, he will not say it; rather, he will deliberate. This is why it was part of Umar’s policy, may Allah be pleased with him, to hold people to the implications of their words.
Our Shaykh Abd al-Rahman ibn Sa‘di, may Allah have mercy on him, chose this view and said: “Shaykh al-Islam presented proofs for it such that no one who reflects upon them can permissibly hold a contrary view.” This view is the correct one.
Shaykh al-Islam explicitly stated that there is no difference between saying, “You are divorced three times,” and saying, “You are divorced; you are divorced; you are divorced.” What he, may Allah have mercy on him, mentioned accords with the position of the jurists on this issue, for those who held that it takes effect as three said that, during the Prophet’s lifetime, a person would repeat, “You are divorced,” as an emphasis, not as a fresh pronouncement, because they regarded three pronouncements as forbidden and thus could not have uttered them. But afterwards, people’s fear diminished