كتاب القرآن
15  
The Qur'an

Yahya related to me from Malik that Abdullah ibn Dinar said, "Abdullah ibn Umar saw me when I was making dua and I was pointing with two fingers, one from each hand, and he forbade me."

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، قَالَ رَآنِي عَبْدُ اللَّهِ بْنُ عُمَرَ وَأَنَا أَدْعُو، وَأُشِيرُ، بِأَصْبُعَيْنِ أَصْبُعٍ مِنْ كُلِّ يَدٍ فَنَهَانِي ‏.‏
Sunnah.com reference : Book 15, Hadith 39
USC-MSA web (English) reference : Book 15, Hadith 37
Arabic reference : Book 15, Hadith 509