Musannaf Ibn Abi Shaybah 15289 — Those who counted their tawaf

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) was asked about the sa'y between Safa and Marwah. He said to the one asking: Begin the circuits (of sa'y) at Safa and end at Marwah, and if you fear forgetting the circuits, take small stones or pebbles with you and drop one pebble at Safa and another at Marwah (this will make counting easier).