From Sahih Bukhari (Hadith 4537):
Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "We have more right to be in doubt than Abraham when he said, 'My Lord! Show me how You give life to the dead.' He said, 'Do you not believe?' He said, 'Yes (I believe) but to be stronger in Faith
Reference: Bukhari 4537