What is the evidence from the Sunnah that pledging is permissible?

The permissibility of pawning (rahn) is evidenced in the Sunnah by what A'isha, may Allah be pleased with her, narrated: that the Prophet, peace and blessings be upon him, passed away while his shield was pawned with a Jew for thirty sa's of barley. From the Quran, it is evidenced by the Almighty's saying: ﴿And if you are on a journey and find no scribe, then a pledge taken into possession.﴾ [Al-Baqarah:283].