These precepts are designed to cultivate a spirit of humanity. Compare Deuteronomy 25:4; Leviticus 22:28; and 1 Corinthians 9:9-10.
The roofs of houses in Palestine were flat and used for various purposes. Compare Jos 2:6; 2 Samuel 11:2; Acts 10:9, etc. A battlement was almost a necessary protection. It was to be, according to the rabbis, at least two cubits high (about 3 ft.).
6 If a bird's nest chance to be before thee in the way in any tree, or on the ground, whether they be young ones, or eggs, and the dam sitting upon the young, or upon the eggs, thou shalt not take the dam with the young:
7 But thou shalt in any wise let the dam go, and take the young to thee; that it may be well with thee, and that thou mayest prolong thy days.
8 When thou buildest a new house, then thou shalt make a battlement for thy roof, that thou bring not blood upon thine house, if any man fall from thence.