Hadithcore
Hadith #2102230

And also a narration of Abu Dawud - 'he turned his neck to the right and left when he reached Haiya 'alas-Salah (Come to the prayer) and did not turn his body'.

وَلِأَبِي دَاوُدَ: { لَوَى عُنُقَهُ, لَمَّا بَلَغَ

حَيَّ عَلَى اَلصَّلَاةِ

يَمِينًا وَشِمَالاً وَلَمْ يَسْتَدِرْ } [1]‏ .‏

References2 variants
Sunnah.com reference
Book 2, Hadith 41
Arabic/English book reference
Book 2, Hadith 0