Another matter: “Behold, I am sending an angel” (Exodus 23:20) – that is what is written: “The angel of the Lord encamps around those who fear Him, and rescues them” (Psalms 34:8). If a person performs one mitzva, the Holy One blessed be He provides him with one angel to protect him, as it is stated: “The angel of the Lord encamps.” If he performs two mitzvot, the Holy One blessed be He provides him with two angels to protect him, as it is stated: “For He will command His angels on your behalf to protect you in all your ways” (Psalms 91:11).
If he performs many mitzvot, the Holy One blessed be He will provide him with half His camp, as it is stated: “A thousand may fall at your side, and ten thousand at your right hand” (Psalms 91:7), and that is half His camp, as it is stated: “The chariots of God are myriad [ribotayim], thousands of companies” (Psalms 68:18).14The term ribotayim literally means tens of thousands. Due to the general rule that plural terms indicate two, as nothing more than that can be conclusively proven from the plural usage, tens of thousands and thousands would mean twenty-two thousand, half of which is eleven thousand.