وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ إِذَا صَلَّى عَلَى الْجَنَائِزِ يُسَلِّمُ حَتَّى يُسْمِعَ مَنْ يَلِيهِ ‏.‏

Yahya related to me from Malik from Nafi that Abdullah ibn Umar,when he prayed over the dead, would say, "Peace be upon you" loudenough for whoever was near to him to hear. Translation Not Available

Book Ref: Muwatta Imam Malik Book 16 Hadith 547
Web Ref:  Muwatta Imam Malik Book 16 Hadith 25