This hadith has been narrated by Khalid al Hadhdha' with the same chain of transmitters but with this alteration that he said:(O Allah! ) let Thee be the caretaker of what is left by him, and he said: Grant him expansion of the grave, but he did not say: Make his grave spacious. Khalid said: He supplicated for the seventh (thing too) which I have forgotten.
وَحَدَّثَنَا مُحَمَّدُ بْنُ مُوسَى الْقَطَّانُ الْوَاسِطِيُّ، حَدَّثَنَا الْمُثَنَّى بْنُ مُعَاذِ بْنِ مُعَاذٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ الْحَسَنِ، حَدَّثَنَا خَالِدٌ الْحَذَّاءُ، بِهَذَا الإِسْنَادِ نَحْوَهُ غَيْرَ أَنَّهُ قَالَ " وَاخْلُفْهُ فِي تَرِكَتِهِ " . وَقَالَ " اللَّهُمَّ أَوْسِعْ لَهُ فِي قَبْرِهِ " . وَلَمْ يَقُلِ " افْسَحْ لَهُ " . وَزَادَ قَالَ خَالِدٌ الْحَذَّاءُ وَدَعْوَةٌ أُخْرَى سَابِعَةٌ نَسِيتُهَا .
Muslim
The Book of Prayer - Funerals • Hadith 9