Responsa do Rodzaju 44:16

And someone who was friendly with the thief for his own benefit made efforts and vouched for him. But one of the learned townspeople took cause with him and said that it is forbidden to save him from the death penalty due to the blood of his fellow Jew whom he killed. Just the opposite, if one of the relatives of the one killed were there, he could have turned him in to the government, as per the law of the blood redeemer. So how could he make efforts to save him? And even though, since this was from the Lord [alluding to Psalms 118:23], and the one making efforts was not successful, the smelter smelted to no purpose [alluding to Jeremiah 6:29], and he was hung, it nevertheless came to my mind that, had this been a question raised to a sage, what would we say and what would we speak [alluding to Genesis 44:16] about it?