Sunan Ibn Majah 3816
سنن ابن ماجه#3816SahihIt was narrated from Sa'eed bin Abu Burdah bin Abu Musa, from his father, that :his grandfather said: "The Messenger of Allah (saas) said: 'I seek the forgivenenss of Allah and repent to Him seventy times each day
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiIsnaad Hasan
In-book reference: 33:160