Hadith.1080 - Abu Habib Najiyah said to Imam Jafar ibn Muhammad Al-Sadiq (as):
"I have a mill where I grind sesame seeds, and I stand to pray, knowing that the servant is asleep. I strike the wall to wake him up."
Imam (as) said: "Yes, you are in the obedience of your Lord (azj), seeking your sustenance. There is no harm in that."