‘…after that, you may ‘repent, and’ become righteous people!’ The brothers had used an interesting phrase here. They were saying, ‘Let’s do the heinous deed, and then after that, we can become good people.’ These thoughts were clearly from Shaytan, who made their evil plot appear justified to them, saying, ‘Don’t worry, you can just atone for it afterwards.’ Shaytan has been deluding people like this since the beginning of time. The brothers didn’t realize that once they committed the crime, they would need to lie to cover it up, and then swear upon that lie.
