Sayyidah Mariyah (may Allah be pleased with her) said: I bent my back down for the Messenger of Allah (peace and blessings be upon him) so that he (peace and blessings be upon him) could climb a wall on the night he (peace and blessings be upon him) escaped from the polytheists.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21541