What should one not say after performing ablution for prayer?

There is no harm in speaking permissible words after ablution. Rather, what was forbidden before ablution, such as lying, backbiting, slandering, cursing, insulting, and the like, remains forbidden. However, since ablution expiates sins and purifies from transgressions, one who has performed ablution should strive to abandon forbidden acts thereafter, so that they may stand before Allah in a state of purity.