Sa'id bin al-Musayyib (may Allah have mercy on him) narrates that he (peace and blessings be upon him) was informed that Abu Lubabah (may Allah be pleased with him) was saying to the sky: 'Hold on longer!' — meaning that he was praying for drought so that the fruit of his date palms would be spent (sold). The Messenger of Allah (peace and blessings be upon him) said: "O Allah, send it (that is, send down rain) until Abu Lubabah is compelled to block the drain-hole of his drying yard with his cloak." So Allah Almighty sent down rain, and when the rainwater reached Abu Lubabah's (may Allah be pleased with him) fruit while he was in his date-drying yard, Abu Lubabah (may Allah be pleased with him) was compelled to use his garment, and he blocked the drain-hole of his yard with it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب صلاة الاستسقاء / 6434