Abdullah bin Umar reported,
The Messenger of Allah ﷺ said, "There is no ruqba. Whoever grants something as ruqba, it belongs to the recipient during his life and after his death."He explained, "Ruqba is when a person says, 'This belongs to whichever of us, you or me, dies last.'"
Ibn Majah 2382
Sahihحدثنا إسحق بن منصور أنبأنا عبد الرزاق أنبأنا ابن جريج عن عطاء عن حبيب بن أبي ثابت
عن ابن عمر قال
قال رسول الله ﷺ لا رقبى فمن أرقب شيئا فهو له حياته ومماته قال والرقبى أن يقول هو للآخر مني ومنك موتا
[Sahih] Reported by Nasai, 6:273, chapter of Umra, mention of the differing wordings of the narrators of Jabir's report on umra, no. 3763, from the hadith of Abdul-Razzaq, by this route, and it is found in Musnad Abdul-Razzaq, 9:196, no. 16920, in full.Ibn Jurayj explicitly stated that he heard it directly, but Habib did not hear this hadith from Ibn Umar 
, and the hadith is sahih on the basis of its corroborating reports. See Nail al-Maqsud, no. 3556, and elsewhere.