Albert Barnes on Acts 9:25

They took him by night, etc. This was done through a window in the wall, 2Cor 11:33.

In a basket. This word is used to denote commonly the basket in which food was carried, Mt 15:37, Mk 8:8,20. This conduct of Saul was in accordance with the direction of the Lord Jesus, Mt 10:23, "When they persecute you in this city, flee ye into another," etc. Saul was certain of death if he remained; and as he could secure his life by flight without abandoning any principle of religion, or denying his Lord, it was his duty to do so. Christianity requires us to sacrifice our lives only when we cannot avoid it without denying the Saviour, or abandoning the principles of our holy religion.

(c) "let him down" Josh 2:15