Do not be sad, for sadness will weaken your determination and the quality of your worship. One of the offshoots of depression is that it often causes one to be pessimistic, to find blame in everyone, including ----and we seek refuge in Allah --- Allah Himself
Do not be sad, for sadness, grief, and anxiety are the roots of mental problems, the sources of stress.
Do not be sad, for you have with you the Qur’an, supplication, remembrance, and prayer. You can lighten the load of your anxiety by giving others, doing well, and being productive.
Do not be sad, and do not surrender to sadness by taking the easy path of idleness and inactivity, but pray, glorify your Lord, read, write, work, visit relatives and friends, and reflect.
(Invoke Me [ask me for anything] I will respond to your [invocation].) (Qur’an 40: 60)
(Invoke your Lord with humility and in secret. He likes not the aggressors) (Qur’an 7: 55)
(S0, call you [O' Muhammad and the believers] upon [or invoke] Allah making [your] worship pure for Him [Alone] [by worshipping none but Him and by doing religious deeds sincerely for Allah s sake only and not to show off and not to set up rivals with Him in Worship]. (Quran 40: 14)
(Say [O’ Muhammad]: ‘invoke Allah or invoke the Most Beneficent [Allah], by whatever name you invoke Him [it is the same], for to Him belong the Best Names.) (Qur’an 17: 110)