Ulangan 1:42

1:42 But the Lord told me: “Tell them this: ‘Do not go up and fight, because I will not be with you and you will be defeated by your enemies.’”

Ulangan 19:10

19:10 You must not shed innocent blood ¹  in your land that the Lord your God is giving you as an inheritance, for that would make you guilty. ² 

[19:10]  ¹ tn Heb “innocent blood must not be shed.” The Hebrew phrase דָּם נָקִי (dam naqiy) means the blood of a person to whom no culpability or responsibility adheres because what he did was without malice aforethought (HALOT 224 s.v דָּם 4.b).

[19:10]  ² tn Heb “and blood will be upon you” (cf. KJV, ASV); NRSV “thereby bringing bloodguilt upon you.”