If a person in Salat is asked to step forward, or to wait, there will be no harm therein

Narrated Sahl bin Sad:

The people used to offer the prayer with the Prophet with their waist-sheets tied round their necks because of the shortness of the sheets and the women were ordered not to lift their heads till the men had sat straight.

حَدَّثَنَا مُحَمَّدُ بْنُ كَثِيرٍ، أَخْبَرَنَا سُفْيَانُ، عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ ـ رضى الله عنه ـ قَالَ كَانَ النَّاسُ يُصَلُّونَ مَعَ النَّبِيِّ ﷺ وَهُمْ عَاقِدُو أُزْرِهِمْ مِنَ الصِّغَرِ عَلَى رِقَابِهِمْ، فَقِيلَ لِلنِّسَاءِ " لاَ تَرْفَعْنَ رُءُوسَكُنَّ حَتَّى يَسْتَوِيَ الرِّجَالُ جُلُوسًا ".