The word(s) "lag" appears 12 time(s) in 12 verse(s) in Quran in Mohsin Khan translation.

(1) And if they had intended to march out, certainly, they would have made some preparation for it; but Allah was averse to their being sent forth, so He made them lag behind, and it was said (to them), "Sit you among those who sit (at home)."

(2) If Allah brings you back to a party of them (the hypocrites), and they ask your permission to go out (to fight), say: "Never shall you go out with me nor fight an enemy with me; you were pleased to sit (inactive) on the first occasion, then you sit (now) with those who lag behind."

(3) They shall not hear therein (in Paradise) any laghw (dirty, false, evil vain talk), but only Salam (salutations of peace). And they will have therein their sustenance, morning and afternoon. [See (V.40:55)].

(4) And those who turn away from Al-laghw (dirty, false, evil vain talk, falsehood, and all that Allah has forbidden).

(5) And when they hear Al-laghw (dirty, false, evil vain talk), they withdraw from it and say: "To us our deeds, and to you your deeds. Peace be to you. We seek not (the way of) the ignorant."

(6) And he said: "Verily, I am sick (with plague). [He did this trick to remain in their temple of idols to destroy them and not to accompany them to the pagan feast)]."

(7) Those of the bedouins who lagged behind will say to you: "Our possessions and our families occupied us, so ask forgiveness for us." They say with their tongues what is not in their hearts. Say: "Who then has any power at all (to intervene) on your behalf with Allah, if He intends you hurt or intends you benefit? Nay, but Allah is Ever All-Aware of what you do.

(8) Those who lagged behind will say, when you set forth to take the spoils, "Allow us to follow you." They want to change Allah's Words. Say: "You shall not follow us; thus Allah has said beforehand." Then they will say: "Nay, you envy us." Nay, but they understand not except a little.

(9) Say (O Muhammad صلى الله عليه وسلم) to the bedouins who lagged behind: "You shall be called to fight against a people given to great warfare, then you shall fight them, or they shall surrender. Then if you obey, Allah will give you a fair reward; but if you turn away as you did turn away before, He will punish you with a painful torment."

(10) There they shall pass from hand to hand a (wine) cup, free from any laghw (dirty, false, evil vain talk between them), and free from sin (because it will be lawful for them to drink).