The Word of God (does not) provide for (or) sanction separation apart from the dissolution of the marriage bond. Divorce for adultery is by divine sanction; it is a divinely instituted provision for a certain situation and it dissolves the bond of marriage. But there is no such provision for mere separation. The divine institution is that those united in the bond of marriage are bound to the mutual discharge of all marital debts until the bond is severed by death or by dissolution on a proper ground.
John Murray