Sunan Abu Dawud, hadith 1501

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ دَاوُدَ، عَنْ هَانِئِ بْنِ عُثْمَانَ، عَنْ حُمَيْضَةَ بِنْتِ يَاسِرٍ، عَنْ يُسَيْرَةَ، أَخْبَرَتْهَا أَنَّ النَّبِيَّ صلى الله عليه وسلم أَمَرَهُنَّ أَنْ يُرَاعِينَ بِالتَّكْبِيرِ وَالتَّقْدِيسِ وَالتَّهْلِيلِ وَأَنْ يَعْقِدْنَ بِالأَنَامِلِ فَإِنَّهُنَّ مَسْئُولاَتٌ مُسْتَنْطَقَاتٌ ‏.‏

Narrated Yusayrah, mother of Yasir: The Prophet (ﷺ) commanded them (the women emigrants) to be regular (in remembering Allah by saying): "Allah is most great"; "Glory be to the King, the Holy"; "there is no god but Allah"; and that they should count them on fingers, for they (the fingers) will be questioned and asked to speak