IV Maccabees 15:13

13 O holy nature and parental feeling, and reward of bringing up children, and unconquerable maternal affection!

IV Maccabees 15:13 In-Context

11 And yet, though there were so many circumstances connected with love of children to draw on a mother to sympathy, in the case of none of them were the various tortures able to pervert her principle.
12 But she inclined each one separately and all together to death for religion.
13 O holy nature and parental feeling, and reward of bringing up children, and unconquerable maternal affection!
14 At the racking and roasting of each one of them, the observant mother was prevented by religion from changing.
15 She beheld her children's flesh dissolving around the fire; and their extremities quivering on the ground, and the flesh of their heads dropped forwards down to their beards, like masks.

The Brenton translation of the Septuagint is in the public domain.