"The Messenger of Allah said; 'DO not be confused by the Adhan of Bilal, or by this whiteness, until dawn appears like this" - meaning horizontally. (One of the narrators) Abu Dawud said: "And he spread out his hands gesturing to the right and left."
قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَغُرَّنَّكُمْ أَذَانُ بِلاَلٍ وَلاَ هَذَا الْبَيَاضُ حَتَّى يَنْفَجِرَ الْفَجْرُ هَكَذَا وَهَكَذَا يَعْنِي مُعْتَرِضًا
Neither the call of Bilal should mislead you nor this whiteness (of false dawn) till (the true) dawn appears (or he said) till the dawn breaks.
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ لاَ يَغُرَّنَّكُمْ نِدَاءُ بِلاَلٍ وَلاَ هَذَا الْبَيَاضُ حَتَّى يَبْدُوَ الْفَجْرُ أَوْ قَالَ حَتَّى يَنْفَجِرَ الْفَجْرُ
[Machine] The Messenger of Allah ﷺ said, "Do not be deceived by the call of Bilal and this whiteness, until the dawn breaks or the day breaks forth."
قَالَ رَسُولُ اللهِ ﷺ لَا يَغُرَّنَّكُمْ نِدَاءُ بِلَالٍ وَهَذَا الْبَيَاضُ حَتَّى يَنْفَجِرَ الْفَجْرُ أَوْ يَطْلُعَ الْفَجْرُ
[Machine] The Messenger of Allah ﷺ said, "Do not be deceived by the call to prayer of Bilal, nor by this blackness (referring to dark color of the Abyssinians), until it becomes like this." And he gestured with his hand in a horizontal manner.
قَالَ رَسُولُ اللهِ ﷺ «لَا يَغُرَّنَّكُمْ أَذَانُ بِلَالٍ وَلَا هَذَا السَّوَادُ حَتَّى يَنْفَجِرَ هَكَذَا» وَقَالَ بِيَدِهِ عَرْضًا
"The Messenger of Allah said; 'DO not be confused by the Adhan of Bilal, or by this whiteness, until dawn appears like this" - meaning horizontally. (One of the narrators) Abu Dawud said: "And he spread out his hands gesturing to the right and left." (Using translation from Nasāʾī 2171)
قَالَ رَسُولُ اللهِ ﷺ «لَا يَغُرَّنَّكُمْ أَذَانُ بِلَالٍ وَلَا هَذَا الْبَيَاضُ حَتَّى يَنْفَجِرَ الْفَجْرُ هَكَذَا وَهَكَذَا» يَعْنِي مُعْتَرِضًا قَالَ أَبُو دَاوُدَ فَبَسَطَ يَدَيْهِ يَمِينًا وَشِمَالًا مَادًّا يَدَيْهِ