Apologies if this was mentioned and I missed it, but I saw it asked what in the books was considered using the power as a weapon, in the context of Moiraine and the damane on the ship in the TV show. During the siege of Tar Valon, Egwene watches ships heading for the city and thinks to herself that she could set the ships on fire or just make holes to sink them. But if so people would surely die (mile to shore and freezing water). And she doesn't because of wanting to live by the Oaths even if she hadn't taken them yet. Then the book then states very specifically that no Aes Sedai who had taken the Oaths could even form the weaves to sink the ships for that reason.