Way of the Prophets in Supplicating to Allah – Shaykh Shaykh Sālih Al-Fawzān
Shaykh Sālih Al-Fawzān (hafidahullāh):
It is a must that the Muslim supplicates and calls upon his Lord in every time and location. He (should) humble himself to Allāh because this is the way of the Prophets and Messengers (alayhimus salātu was salām.)
Source: Official website of the Shaykh.