“Verily, Allah forgives not that partners should be set up with Him (in worship), but he forgives except that (anything else) to whom He wills, and whosoever set up partners with Allah, he has indeed invented a tremendous sin.” Ch4 V48
“And obey Allah and His Messenger (S.A.W) and do not dispute (with one another) lest you lose courage and your strength departs, and be patient. Surely, Allah is with those who are As–Sabirun (the patient).” Ch8 V46
“O you who believe! Seek help in patience and As–Salat (the prayer). Truly! Allah is with As-Sabirun (the patient).” Ch2 V153
“Verily, along with every hardship is relief” Ch94 V5
from the Ideal Muslim Worker http://idealmuslimworker.com.