MatMt MatthewMatthäus, chapterKapitel The Gospel According to MatthewDas Evangelium nach Matthäus, chapterKapitel 5

And again, you've heard that the law said to the people of long ago, ‘You shall not perjure yourself. Instead make sure you keep the oaths you swear to the Lord.’(l)5:33. Quoting Numbers 30:2.