Sahih Bukhari Volume 4, Book 56, Hadith 3034

وَقَالَ اللَّيْثُ حَدَّثَنِي عُقَيْلٌ، عَنِ ابْنِ شِهَابٍ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّهُ قَالَ انْطَلَقَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَمَعَهُ أُبَىُّ بْنُ كَعْبٍ قِبَلَ ابْنِ صَيَّادٍ، فَحُدِّثَ بِهِ فِي نَخْلٍ، فَلَمَّا دَخَلَ عَلَيْهِ رَسُولُ اللَّهِ صلى الله عليه وسلم النَّخْلَ، طَفِقَ يَتَّقِي بِجُذُوعِ النَّخْلِ، وَابْنُ صَيَّادٍ فِي قَطِيفَةٍ لَهُ فِيهَا رَمْرَمَةٌ، فَرَأَتْ أُمُّ ابْنِ صَيَّادٍ رَسُولَ اللَّهِ صلى الله عليه وسلم فَقَالَتْ يَا صَافِ، هَذَا مُحَمَّدٌ، فَوَثَبَ ابْنُ صَيَّادٍ، فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ لَوْ تَرَكَتْهُ بَيَّنَ ‏"‏‏

Narrated Abdullah bin Umar(R.A.) : Once Allah's Messenger (s.a.w.)accompanied by Ubai bin Ka'b set out to Ibn Saiyyad.He was informed that Ibn Saiyyad was in a garden of date-palms.When Allah's Messenger(s.a.w.) entered the garden of date-palms, he started hiding himself behind the trunks of the palms while Ibn Saiyyad was covered with the velvet sheet with murmurs emanating from under it.Ibn Saiyyad's mother saw Allah's Messenger(s.a.w.) and said,"O Saf ! This is Mohammad ". So Ibn Saiyyad got up. Allah's Messenger(s.a.w.) said," If she had left him(in his state) , the truth would have been clear."