Joshua 2:12

2:12 So now, promise me this with an oath sworn in the Lord’s name. Because I have shown allegiance to you, show allegiance to my family. Give me a solemn pledge

Joshua 9:18-19

9:18 The Israelites did not attack them because the leaders of the community had sworn an oath to them in the name of the Lord God of Israel. The whole community criticized the leaders, 9:19 but all the leaders told the whole community, “We swore an oath to them in the name of the Lord God of Israel. So now we can’t hurt them!