Ata (may Allah have mercy on him) narrates from Ibn Abbas (may Allah be pleased with them both) that he set one dirham as the penalty for every two eggs of the pigeons of the sanctuary.
(b) Imam al-Shafi'i (may Allah have mercy on him) narrated it through Ibn Jurayj as the saying of Ata (may Allah have mercy on him) himself, then he said: I think that by this saying Ata meant the value as it was on the day he said it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10025