Thy congregation hath dwelt therein; thy troop, or thy host (see 2 Samuel 23:11, 2 Samuel 23:13). The word used ( חיּה) is an unusual one. Thou, O God, hast prepared of thy goodness for the poor; or, thou, O God, didst in thy goodness make preparation for the poor.
"The poor" are the Israelites, brought low by their sufferings in Egypt and the wilderness; the preparations those by which their conquest of Palestine was facilitated (Exodus 25:28; Joshua 24:12).