تفسير : and from his narration on the authority of ibn 'abbas that he said concerning the interpretation of allah's saying (have we not caused thy bosom to dilate): '(have we not caused thy bosom to dilate) this is in conjunction with his saying (did he not find thee destitute and enrich (thee)?), and so allah says: did we not open your heart for islam? i.e. did we not soften your heart on the day of the covenant through knowledge, understanding, help, reason and certainty, as well as with other things? it is also said this means: did we not expand your heart through prophethood? and the prophet (pbuh) said: “yes, indeed!”
Jalāl al-Dīn al-Maḥallī
تفسير : did we not expand (an interrogative meant as an affirmative, in other words, ‘we did [indeed] expand’) your breast for you, o muhammad (s), by means of prophethood and otherwise,
Sahl al-Tustari
تفسير : did we not expand your breast for you?he said:‘did we not dilate your breast for you, with the light of the message (risāla), and make it a mine for the spiritual realities (maʿdan li’l-ḥaqāʾiq)?’he [further] said:the first expansion takes place through the light of islam, just as he has said, exalted is he, whomever god desires to guide, he expands his breast to islam [6:125].then he said:then he augments the degrees (manāzil) in addition [to this light], and the lights of [a believer] will be in proportion to the insights he has been granted.