Srimad Bhagavatam Canto 04, Chapter 19, Text 34

SB 4.19.34

masmin maharaja krthah sma cintam
nisamayasmad-vaca adrtatma
yad dhyayato daiva-hatam nu kartum
mano ’tirustam visate tamo ’ndham
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
My dear King, do not be agitated and anxious because your sacrifices have not been properly executed due to providential impediments. Kindly take my words with great respect. We should always remember that if something happens by providential arrangement, we should not be very sorry. The more we try to rectify such reversals, the more we enter into the darkest region of materialistic thought.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
 
Sometimes the saintly or very religious person also has to meet with reversals in life. Such incidents should be taken as providential. Although there may be sufficient cause for being unhappy, one should avoid counteracting such reversals, for the more we become implicated in rectifying such reversals, the more we enter into the darkest regions of material anxiety. Lord Krsna has also advised us in this connection: we should tolerate things instead of becoming agitated.