"Now a bishop must be above reproach, the husband of one wife, temperate, sensible, dignified, hospitable, an apt teacher, no drunkard, not violent but gentle, not quarrelsome, and no lover of money."
"Let deacons be the husband of one wife, and let them manage their children and their households well;"
- 1 Timothy 3:2-3, 12
The Orthodox Church has traditionally seen this as not merely a mandate against polygamy among the clergy; the Church has also understood this mandate serially, that a clergyman must be the husband of but one wife over the course of his entire lifetime. That is why a number of canons disqualify an unordained man from holy orders if he has already been divorced (or widowed) and remarried. Likewise, one who has been divorced after his ordination must renounce his ordination if he desires to remarry. But lest you think, "O, that poor priest," remember that this rule also applies to priests whose wives have died.