hadith
4061
۞
A group of people asked Imam al-Sadiq (AS), ‘We supplicate but are not answered? the Imam said, ‘Because you call upon One whom you do not know.
الإمامُ الصّادقُ (عَلَيهِ الّسَلامُ) ـ و قَد سَألَهُ قومٌ: نَدعو فلا يُستَجابُ لَنا ؟! ـ: لأنَّكُم تَدعونَ مَن لا تَعرِفونَهُ.