Muwatta Imam Malik Book of Hajj, Hadith 110

Yahya related to me from Malik from Hisham ibn Urwa that when his father did tawaf of the House he would hasten in the first three circuits and say in a low voice, "O Allah, there is no god but You, and You bring to life after You have made to die."
Allahumma la ilaha illa anta, wa anta tuhyi badama amatta.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، أَنَّ أَبَاهُ، كَانَ إِذَا طَافَ بِالْبَيْتِ يَسْعَى الأَشْوَاطَ الثَّلاَثَةَ يَقُولُ اللَّهُمَّ لاَ إِلَهَ إِلاَّ أَنْتَا وَأَنْتَ تُحْيِي بَعْدَ مَا أَمَتَّا يَخْفِضُ صَوْتَهُ بِذَلِكَ .