바미드바르 (민수기) 27:17

אשר יצא לפניהם ONE WHO MAY GO BEFORE THEM — not as is the way of the kings of the nations who sit at home and send their armies to battle, but as “I” have done — I who fought against Sihon and against Og, as it is said, (Numbers 21:34) “Do not fear him: “[for I have delivered him into thy hand … and thou shall do to him as thou didst unto Sihon, etc.]” and as is the way that Joshua followed, as it is said, (Joshua 5:3) “And Joshua went to him and said, Art thou for us [or for our adversaries]”. And so, too, in the case of David, it says, (I Samuel 18:16) “For he went out and came in before them” — went out at their head, and came in at their head (Sifrei Bamidbar 139:2). ואשר יוציאם AND WHO WILL LEAD THEM OUT, safely through his merits, ואשר יביאם AND WHO WILL BRING THEM IN, safely through his merits (Siphre). Another explanation: ואשר יביאם AND WHO WILL BRING THEM IN — I ask that You should not do to him, as You have done to me' for I may not bring them into the Land. (cf. Yalkut Shimoni on Torah 776).

אֲשֶׁר־יֵצֵ֣א לִפְנֵיהֶ֗ם וַאֲשֶׁ֤ר יָבֹא֙ לִפְנֵיהֶ֔ם וַאֲשֶׁ֥ר יוֹצִיאֵ֖ם וַאֲשֶׁ֣ר יְבִיאֵ֑ם וְלֹ֤א תִהְיֶה֙ עֲדַ֣ת יְהֹוָ֔ה כַּצֹּ֕אן אֲשֶׁ֥ר אֵין־לָהֶ֖ם רֹעֶֽה׃

who may go out before them, and who may go in before them, and who may lead them out, and may bring them in; that the congregation of the Lord be not as sheep that have no shepherd.