Virtue of Du'a'
Du'a' is worship:
Narrated An-Nu'man ibn Bashir [Radi Allahu anhu : May Allah be pleased with him]:
The Prophet [Salla Allahu Aleihi Wassalam] said: Supplication (du'a') is itself the worship (Al-`Ibadah ). (He then recited "And your Lord said: Invoke Me, (i.e...