Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
abudawud:283ʿAbdullāh b. Maslamah al-Qaʿnabī > Mālik > Hishām Biʾisnād Zuhayr And Maʿnāh

When the menstruation begins, you should abandon prayer; when the period equal to its length of time passes, you should wash away the blood and pray.  

أبو داود:٢٨٣حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ الْقَعْنَبِيُّ عَنْ مَالِكٍ عَنْ هِشَامٍ بِإِسْنَادِ زُهَيْرٍ وَمَعْنَاهُ

وَقَالَ فَإِذَا أَقْبَلَتِ الْحَيْضَةُ فَاتْرُكِي الصَّلاَةَ فَإِذَا ذَهَبَ قَدْرُهَا فَاغْسِلِي الدَّمَ عَنْكِ وَصَلِّي