Bulugh al-Maram
Book 8, Hadith 115
Arabic hadith text
وَفِي رِوَايَةٍ لَهُ : { وَأَمَرَهُ بِطَلَاقِهَا } 1 .1 - صحيح . رواه البخاري ( 9 / 395 / فتح ).
Translation
Another narration by him has
"He commanded him to divorce her."