It is narrated from Sa'id bin al-Musayyib (may Allah have mercy on him) that the Messenger of Allah (ﷺ) said: "The mortgaged item will not be withheld from the one who has mortgaged it; its benefit is for him, and he is also responsible for its loss."
Hadith Referenceمسند الإمام الشافعي / كتاب الرهن والقراض والحجر والتفليس واللقطة / 1479