Why was the word "بها" (with it/therein) used in His, the Almighty’s, saying: "A spring whereof drink those nearest [to Allah]" instead of "منها" (from it)?

The letter "baa'" (ب) carries several meanings, among them is "tab'eed" (partiality), in which case it would mean "min" (from), i.e., "the favored ones drink from it." Or it could mean to be quenched, or to derive pleasure, or to benefit. Al-Tabari mentioned that "yashrabu biha" (drink with it) and "yashrabuha" (drink it) have the same meaning. The "baa'" might also be superfluous.