Exodus 21:11

And if these three things he doth not for her, to covenant her to himself, or to his son, or to release her into the hand of her father, she shall go free without payment, and a writing of release he shall give her.

AND IF THESE THREE — designating her to himself as his wife, or to his son, or allowing her to be redeemed — HE DO NOT UNTO HER, then SHALL SHE GO OUT FOR NOTHING, WITHOUT MONEY, as do the menservants mentioned.. But if the master do not these three things to her [as explained], then she shall go out as the menservants do. See Ramban above at the end of Verse 8 [“The plain meaning of Scripture in this section etc.”]. To this he now adds that if the master fails to do any of the three ways to ameliorate her condition, then she shall go out free for nothing, as menservants do.

ואם שלש אלה, that he neither wants to marry her himself, nor have her marry his son, nor allow her to buy herself out of her contract,

ויצאה חנם אין כסף, the court will declare her free from her contract without her owing the master-employer any compensation for unexpired years of service. Our sages, (Kidushin 4) understood the verse halachically as meaning that she is entitled to leave that employ upon the signs of puberty without reference to the Jubilee year or the expiry of the six years for which her father had contracted her to the employer.

ואם שלש אלה לא יעשה לה, “and if her master had not performed any of the three options offered him by the Torah, etc.” Rashi spells out what these three options were; a) he marries her; b) his son marries her; c) she pays to redeem herself. The interpretation of the three options do not refer to her enduring upon being married to her former master that her husband marries someone else in addition, less frequent opportunities to marital relations with her husband. Her entitlements to clothing, marital relations are unimpaired. When she reaches puberty she goes free and must receive a definite document of divorce to ensure that she can marry without problems.

ויצאה חנם, “she will leave for nothing without money” (to her master). This verse speaks of her leaving after having attained the status of נערה, the period between twelve years and a day, and twelve and a half years.

The additional words: אין כסף, “without money changing hands,” apply to a situation in which she has attained the status of בגרות, biological maturity, i.e. over twelve and a half years of age. (Talmud, tractate Kiddushin folio 4) The reason this had to be added is that if the Torah had not written this, we would have assumed that already the words ויצאה חנם apply to her having this status, which would have been a simple assumption to make. In the event that you the reader would raise the question that seeing that this girl is legally entitled to leave the employ of her master already when having attained the status of נערה, why would the Torah have to add anything further, the answer to this question given by the Talmud we quoted, is that if she had displayed symptoms of being unable to bear children, i.e. she never displayed the symptoms attesting to the fact that she had matured biologically, in which case the Torah rules that when she attains the age of twelve and a half she must be given her freedom regardless of any other considerations.