TDN.96:5 :ܬܪܕܐ ܥܡ ܢܟܦܘ݂ܬܐ ܘܫܠܝܘܬܐ‏ : you should behave with modesty and tranquility
See the entire entry for šalyū, šalyūṯā n.f. tranquility