The Apostle Paul
1 Thessalonians 3:1BSB·traditional attribution

So when we could bear it no longer, we were willing to be left on our own in Athens.

John Calvin Reformed @genevareformer

1 Wherefore, when we could no longer endure. By the detail which follows, he assures them of the desire of which he had spoken. For if, on being detained elsewhere, he had sent no other to Thessalonica in his place, it might have seemed as though he were not so much concerned in regard to them; but when he substitutes Timothy in his place, he...

Matthew Henry Presbyterian @wholebiblehenry

In these words the apostle gives an account of his sending Timothy to the Thessalonians. Though he was hindered from going to them himself, yet his love was such that he could not forbear sending Timothy to them. Though Timothy was very useful to him, and he could not well spare him, yet Paul was content, for their good, to be left alone at Athens.

Commenting on 1 Thessalonians 3:1-5

John Gill Reformed Baptist @doctorgill

Wherefore when we could no longer forbear,.... Or "bear", as the word properly signifies; or "bear that", as the Ethiopic version reads; that is, "that desire", as the Arabic version renders it; that ardent and longing desire of seeing them again, expressed in the latter part of the preceding chapter; which was as fire in their bones, and was retained with great pain and uneasiness...