Jami' at-Tirmidhi
Jami` at-Tirmidhi 551
حَدَّثَنَا عَلِيُّ بْنُ حُجْرٍ، حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، عَنِ الْحَجَّاجِ، عَنْ عَطِيَّةَ، عَنِ ابْنِ عُمَرَ، قَالَ صَلَّيْتُ مَعَ النَّبِيِّ صلى الله عليه وسلم الظُّهْرَ فِي السَّفَرِ رَكْعَتَيْنِ وَبَعْدَهَا رَكْعَتَيْنِ . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ . وَقَدْ رَوَاهُ ابْنُ أَبِي لَيْلَى عَنْ عَطِيَّةَ وَنَافِعٍ عَنِ ابْنِ عُمَرَ .
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Ibn Umar said: I prayed Zuhr with the Prophet while traveling: two units, followed by two more units. Abu Isa said: This hadith is hasan. Ibn Abi Layla also transmitted it from Atiyyah and Nafi, from Ibn Umar.
Notes and open questions — unreviewed
The two units after Zuhr are kept as stated, without adding a legal classification.