NASAI-KUBRA 7666:
from Sālim from his father —
The oath of the Prophet ﷺ used to be: "No, by Him who turns the hearts." (Using translation from Bukhārī 6628)
الكبرى للنسائي ٧٦٦٦:
عن سالم عن أبيه —
كَانَتْ يَمِينُ رَسُولِ اللهِ ﷺ «لَا وَمُقَلِّبِ الْقُلُوبِ»