Musannaf Ibn Abi Shaybah

Ibrahim (may Allah have mercy on him) says that if a person says to his wife, "You are divorced," what is the ruling? He says that he asked Hazrat Salim (may Allah have mercy on him) and Hazrat Qasim (may Allah have mercy on him) about this, and they said, "In our opinion, he should be made to swear an oath that he did not intend a final divorce."

Hazrat Saeed bin Musayyib (may Allah have mercy on him) says that if a person says to his wife, "You are divorced," and does not mention a number, then his intention will be considered—whether he intended one, two, or three divorces.