These requirements were already present in the Old Testament, where legislation dealt with protecting and defending life when it was weak and threatened: in the case of foreigners, widows, orphans, the sick and the poor in general, including children in the womb (cf.
Druso propinquantiquasi per officium obviae fuere legiones, non laetae, ut adsolet, neque insignibus fulgentes, sed inluvie deformi et vultu, quamquam maestitiam imitarentur contumaciae propiores.vatican.va vatican.va