Michal was originally David's wife, but Saul gave her to Palti after she helped David escape from Saul. Later when David became king of Judah and Ish-bosheth Saul's son (and Michal's brother) was king of Israel, David demanded her return to him, in return for peace between them. This Ish-bosheth did.
The account says that Palti "followed her weeping as far as Bahurim. But Abner said to him 'Go Back!'. And he turned back.". According to the Talmud, Palti never consummated his marriage with Michal, but kept a sword between them while in bed to separate them. The Talmud explains his weeping as sorrow over the loss of a good deed, and not as weeping for the loss of Michal herself:
Is it not written (II Samuel 3.16), He went weeping? —This was for losing the good deed [of self-restraint]. Hence [he followed her] to [the town called] Bahurim (literally, youths), implying that they both had remained like unmarried youths and not tasted the pleasure of marital relations.
This article related to the Hebrew Bible is a stub. You can help by expanding it.