Sahih Muslim

Jabir reported that Allah's Messenger (ﷺ) said:Iblis places his throne upon water; he then sends detachments (for creating dissension) ; the nearer to him in rank are those who are most notorious in creating dissension. One of them comes and says: ""I did so and so."" And he says: ""You have done nothing."" Then one amongst them comes and says: ""I did not spare so and so until I sowed the seed of discord between a husband and a wife."" The Satan goes near him and says: ""You have done well."" A'mash said: He then embraces him