Is it permissible for a man to free a female slave and then marry her?

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It is permissible for a man to free a female slave and subsequently marry her. This permissibility holds true whether he freed her solely for the sake of Allah (SWT) or specifically intended to marry her afterward. The evidence supporting this is the saying of the Messenger of Allah (peace be upon him), as narrated by Abu Musa: "Whoever has a female slave, teaches her, treats her well, then frees her and marries her, he will have a double reward." This Hadith is agreed upon (Muttafaq Alayh). Furthermore, marrying her constitutes a kindness to her by providing chastity and protection, which is not disliked, analogous to if he were to marry her to someone else. This action does not constitute retracting from a dedication made to Allah (SWT), as he marries her by granting her a dower (mahr), which is treated like a transaction where he purchases something from her.