Hadithcore
Mishkat al-Masabih, 756

He said that he heard God’s Messenger say, “If anyone prays in a single garment he should cross the two ends.” Bukhari transmitted it.

وَعَنْهُ قَالَ: سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: «مَنْ صَلَّى فِي ثَوْبٍ وَاحِدٍ فليخالف بَين طَرفَيْهِ» . رَوَاهُ البُخَارِيّ

References1 variant
In-Book Reference
Book 4, Hadith 184