BT Bek 24a(17) :הא {א}^ה^יכא דאוליד חיישינ׳ לרחומי או דיל׳ דידה מרחמא דלא דידה לא מרחמא‏ : where it had (previously) given birth, we suspect that (the animal) will give suck (to another’s child). Or perhaps it will give suck to its own, but it will not give suck to one that is not its own
See the entire entry for rḥm vb. to love