'Brother's' in the Bible

The officers shall speak further to the people, and they shall say, "What man is there who is fearful and fainthearted? Let him go and return to his house, lest his brother's heart melt as his heart."

You shall not see your brother's ox or his sheep go astray, and hide yourself from them: you shall surely bring them again to your brother.

So you shall do with his donkey; and so you shall do with his garment; and so you shall do with every lost thing of your brother's, which he has lost, and you have found: you may not hide yourself.

You shall not see your brother's donkey or his ox fallen down by the way, and hide yourself from them: you shall surely help him to lift them up again.

If the man doesn't want to take his brother's wife, then his brother's wife shall go up to the gate to the elders, and say, "My husband's brother refuses to raise up to his brother a name in Israel; he will not perform the duty of a husband's brother to me."

then his brother's wife shall come to him in the presence of the elders, and loose his shoe from off his foot, and spit in his face; and she shall answer and say, "So shall it be done to the man who does not build up his brother's house."