It is narrated from Ata (may Allah have mercy on him): If a woman becomes pure from menstruation but does not find water, he said: When she performs tayammum, her husband may have intercourse with her. Imam Darimi (may Allah have mercy on him) was asked: Is this your opinion as well? He replied: Yes, by Allah.
Hadith Referenceسنن دارمي / من كتاب الطهارة / 1210
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده ضعيف فيه ابن جريج وقد عنعن، [مكتبه الشامله نمبر: 1214]
Hadith Takhrijاس روایت کی سند ابن جریج کی تدلیس کی وجہ سے ضعیف ہے۔ دیکھئے: [مصنف عبدالرزاق 925]
Brief Explanation
(Commentary on Ahadith 1208 to 1210) After becoming pure from menstruation, if water is not available, this ruling is correct; in a situation of necessity, this can be done, that is, she may perform tayammum (dry ablution) and offer prayer, and her husband may have intercourse with her. And Allah knows best.