Sayyiduna Jabir bin Abdullah (may Allah be pleased with both of them) narrates that the Noble Prophet (peace and blessings be upon him) held a race between horses, and I was riding one of those horses. The Noble Prophet (peace and blessings be upon him) said: "You should keep urging it on continuously, that is, keep striking it with the whip continuously."
Hadith Referenceسنن الدارقطني / كتاب السبق بين الخيل وما روي فيه عن النبى صلى الله عليه وسلم وهو زيادة فى الكتاب / 4823
Hadith Takhrij«أخرجه الدارقطني فى ((سننه)) برقم: 4823 ، انفرد به المصنف من هذا الطريق»