Ibrahim bin Maysarah (may Allah have mercy on him) said that a man asked Ibn al-Musayyib (may Allah have mercy on him): I have sworn that I will not speak to a man for a hin (a while)? He said: Allah Almighty says: "It brings forth its fruit every hin (season) by the permission of its Lord." [Surah Ibrahim: 25] He said: This is the date palm, whose fruit is borne for one or two months. In our view, hin means two months.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الأيمان / 20018