But when the sun rose, the seedlings were scorched, and they withered because they had no root.
Cross References
Matthew 13:5Some fell on rocky ground, where it did not have much soil. It sprang up quickly because the soil was shallow.
Matthew 13:7Other seed fell among thorns, which grew up and choked the seedlings.
Mark 4:6But when the sun rose, the seedlings were scorched, and they withered because they had no root.
 Treasury of Scripture
And when the sun was up, they were scorched; and because they had no root, they withered away.
when.
Matthew 13:21
 Yet hath he not root in himself, but dureth for a while: for when tribulation or persecution ariseth because of the word, by and by he is offended.
Isaiah 49:10
 They shall not hunger nor thirst; neither shall the heat nor sun smite them: for he that hath mercy on them shall lead them, even by the springs of water shall he guide them.
James 1:11,12
 For the sun is no sooner risen with a burning heat, but it withereth the grass, and the flower thereof falleth, and the grace of the fashion of it perisheth: so also shall the rich man fade away in his ways… 
because.
Matthew 7:26,27
 And every one that heareth these sayings of mine, and doeth them not, shall be likened unto a foolish man, which built his house upon the sand: … 
Luke 8:13
 They on the rock are they, which, when they hear, receive the word with joy; and these have no root, which for a while believe, and in time of temptation fall away.
Ephesians 3:17
 That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love,