Zaid b. Thabit (Allah be pleased with him) said:We took meal shortly before dawn along with the Messenger of Allah (ﷺ). We then stood up for prayer. I said: How much span of time was there between the two (acts, i. e. taking of Sahri and observing of prayer)? He said (a span of reciting) fifty verses

This hadith has been transmitted on the authority of Qatada too