Sayyiduna Jabir (may Allah be pleased with him) said: A man came and said: I became junub, and I rolled about in the dust (for tayammum). He said: "Strike your hands on the soil." So he struck his hands on the ground and wiped his face, then struck his hands (on the ground) again and wiped his hands up to the elbows.
This is how he narrated it, and its chain is sahih (authentic), except that it does not make clear the instruction given to him for this.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 998