It is narrated from Mu'ammar that Imam Zuhri, may Allah have mercy on him, was asked about a person who makes a will, then makes another will? Zuhri, may Allah have mercy on him, said: Both wills are permissible regarding his wealth (i.e., he has the right to change them).
Hadith Referenceسنن دارمي / من كتاب الوصايا / 3246
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده صحيح إلى الزهري، [مكتبه الشامله نمبر: 3257]
Hadith Takhrijاس حدیث کی سند امام زہری رحمہ اللہ تک صحیح ہے۔ دیکھئے: [عبدالرزاق 16389] ، [ابن منصور 370]