Sunan an-Nasa'i 1888

أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ أَيُّوبَ، عَنْ حَفْصَةَ، عَنْ أُمِّ عَطِيَّةَ، نَحْوَهُ غَيْرَ أَنَّهُ قَالَ ‏ "‏ ثَلاَثًا أَوْ خَمْسًا أَوْ سَبْعًا أَوْ أَكْثَرَ مِنْ ذَلِكِ إِنْ رَأَيْتُنَّ ذَلِكِ ‏"‏ ‏.‏

Something similar was narrated from Umm 'Atiyyah except, that he (the narrator) said:"Three times or five, or seven, or more than that, if you think that (is necessary)

Reference

Sunan an-Nasa'i 1888

In-book

Book 21, Hadith 71