One verse

Srimad Bhagavatam 11.18.33

11.18.33

अलब्ध्वा न विषीदेत काले कालेऽशनं क्व‍‍चित् । लब्ध्वा न हृष्येद् धृतिमानुभयं दैवतन्त्रितम् ॥ ३३ ॥

alabdhvā na viṣīdeta kāle kāle ’śanaṁ kvacit labdhvā na hṛṣyed dhṛtimān ubhayaṁ daiva-tantritam

alabdhvā
not obtaining
na
not
viṣīdeta
he should be depressed
kāle kāle
at different times
aśanam
food
kvacit
whatever
labdhvā
obtaining
na
not
hṛṣyet
should rejoice
dhṛti-mān
fixed in determination
ubhayam
both (obtaining and not obtaining good food)
daiva
of the supreme power of God
tantritam
under the control

If at times one does not obtain proper food one should not be depressed, and when one obtains sumptuous food one should not rejoice. Being fixed in determination, one should understand both situations to be under the control of God.