الْأَدَبُ الْمُفْرَدُ
Al-Adab al-Mufrad 1125
Letters
The one who is put first in a letter
وَعَنِ ابْنِ عَوْنٍ، عَنْ أَنَسِ بْنِ سِيرِينَ قَالَ: كَتَبْتُ لِابْنِ عُمَرَ، فَقَالَ: اكْتُبْ بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ، أَمَّا بَعْدُ: إِلَى فُلانٍ.
Anas ibn Sirin said, "I wrote for Ibn 'Umar and he said, 'Write: "In the Name of Allah, the All-Merciful, Most Merciful. Following on from that: To so-and-so."'"
Al-Adab Al-Mufrad, 1125Sahih (Al-Albani)صـحـيـح (الألباني)