Charles H. Spurgeon on Psalms 55:18

There were many with me. This is doubtful whether it be meant of foes or friends. If of foes, it may be resolved thus: for with many (with a great multitude) they were fighters with me. If of friends, it may be understood of God's angels, that in a great number were with him, pitching camp for his aid (Ps 34:7); as Elisha said, "Many more are with us than with them." 2Ki 6:16-17. The Chaldee explains it, "For in many afflictions his word was for my help." Henry Ainsworth.